Core/Misc: Fix some static analysis issues

Add some asserts and additional NULL checks as sanity checks.

src/server/game/DungeonFinding/LFGMgr.cpp

@@ -968,6 +968,7 @@ void LFGMgr::MakeNewGroup(LfgProposal const& proposal)
             player->CastSpell(player, LFG_SPELL_DUNGEON_COOLDOWN, false);
     }
 
+    ASSERT(grp);
     grp->SetDungeonDifficulty(Difficulty(dungeon->difficulty));
     uint64 gguid = grp->GetGUID();
     SetDungeon(gguid, dungeon->Entry());

src/server/game/Entities/GameObject/GameObject.cpp

@@ -1034,6 +1034,7 @@ void GameObject::TriggeringLinkedGameObject(uint32 trapEntry, Unit* target)
     if (!trapSpell)                                          // checked at load already
         return;
 
+    ASSERT(GetOwner());
     float range = float(target->GetSpellMaxRangeForTarget(GetOwner(), trapSpell));
 
     // search nearest linked GO

src/server/game/Entities/Object/Object.cpp

@@ -370,6 +370,7 @@ void Object::BuildMovementUpdate(ByteBuffer* data, uint16 flags) const
     {
         if (flags & UPDATEFLAG_POSITION)
         {
+            ASSERT(object);
             Transport* transport = object->GetTransport();
 
             if (transport)
@@ -459,6 +460,7 @@ void Object::BuildMovementUpdate(ByteBuffer* data, uint16 flags) const
     // 0x4
     if (flags & UPDATEFLAG_HAS_TARGET)
     {
+        ASSERT(unit);
         if (Unit* victim = unit->GetVictim())
             data->append(victim->GetPackGUID());
         else

src/server/game/Entities/Player/Player.cpp

@@ -4205,6 +4205,7 @@ bool Player::Has310Flyer(bool checkAllSpells, uint32 excludeSpellId)
                     break;  // We can break because mount spells belong only to one skillline (at least 310 flyers do)
 
                 spellInfo = sSpellMgr->GetSpellInfo(itr->first);
+                ASSERT(spellInfo);
                 for (uint8 i = 0; i < MAX_SPELL_EFFECTS; ++i)
                     if (spellInfo->Effects[i].ApplyAuraName == SPELL_AURA_MOD_INCREASE_MOUNTED_FLIGHT_SPEED &&
                         spellInfo->Effects[i].CalcValue() == 310)
@@ -15743,6 +15744,7 @@ bool Player::SatisfyQuestExclusiveGroup(Quest const* qInfo, bool msg)
 
         // not allow have daily quest if daily quest from exclusive group already recently completed
         Quest const* Nquest = sObjectMgr->GetQuestTemplate(exclude_Id);
+        ASSERT(Nquest);
         if (!SatisfyQuestDay(Nquest, false) || !SatisfyQuestWeek(Nquest, false) || !SatisfyQuestSeasonal(Nquest, false))
         {
             if (msg)
@@ -15944,6 +15946,7 @@ bool Player::TakeQuestSourceItem(uint32 questId, bool msg)
                 return false;
             }
 
+            ASSERT(item);
             bool destroyItem = true;
             for (uint8 n = 0; n < QUEST_ITEM_OBJECTIVES_COUNT; ++n)
                 if (item->StartQuest == questId && srcItemId == quest->RequiredItemId[n])
@@ -21330,6 +21333,7 @@ bool Player::ActivateTaxiPathTo(std::vector<uint32> const& nodes, Creature* npc
     if (sWorld->getBoolConfig(CONFIG_INSTANT_TAXI))
     {
         TaxiNodesEntry const* lastPathNode = sTaxiNodesStore.LookupEntry(nodes[nodes.size()-1]);
+        ASSERT(lastPathNode);
         m_taxi.ClearTaxiDestinations();
         TeleportTo(lastPathNode->map_id, lastPathNode->x, lastPathNode->y, lastPathNode->z, GetOrientation());
         return false;
@@ -21550,6 +21554,7 @@ inline bool Player::_StoreOrEquipNewItem(uint32 vendorslot, uint32 item, uint8 c
     if (crItem->ExtendedCost)                            // case for new honor system
     {
         ItemExtendedCostEntry const* iece = sItemExtendedCostStore.LookupEntry(crItem->ExtendedCost);
+        ASSERT(iece);
         if (iece->reqhonorpoints)
             ModifyHonorPoints(- int32(iece->reqhonorpoints * count));
 

src/server/scripts/Northrend/Gundrak/boss_slad_ran.cpp

@@ -250,8 +250,9 @@ public:
                     target->CastSpell(target, SPELL_SNAKE_WRAP, true);
 
                     if (TempSummon* _me = me->ToTempSummon())
-                        if (Creature* sladran = _me->GetSummoner()->ToCreature())
-                            sladran->AI()->SetGUID(target->GetGUID(), DATA_SNAKES_WHYD_IT_HAVE_TO_BE_SNAKES);
+                        if (Unit* summoner = _me->GetSummoner())
+                            if (Creature* sladran = summoner->ToCreature())
+                                sladran->AI()->SetGUID(target->GetGUID(), DATA_SNAKES_WHYD_IT_HAVE_TO_BE_SNAKES);
 
                     me->DespawnOrUnsummon();
                 }

src/server/scripts/Outland/BlackTemple/boss_reliquary_of_souls.cpp

@@ -295,13 +295,13 @@ public:
                     Timer = 1000;
                     if (Phase == 3)
                     {
-                        if (!Essence->IsAlive())
+                        if (Essence && !Essence->IsAlive())
                             DoCast(me, 7, true);
                         else return;
                     }
                     else
                     {
-                        if (Essence->HasFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NOT_SELECTABLE))
+                        if (Essence && Essence->HasFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NOT_SELECTABLE))
                         {
                             MergeThreatList(Essence);
                             Essence->RemoveAllAuras();
@@ -312,31 +312,37 @@ public:
                     break;
                 case 4:
                     Timer = 1500;
-                    if (Essence->IsWithinDistInMap(me, 10))
+                    if (Essence)
                     {
-                        Essence->SetUInt32Value(UNIT_NPC_EMOTESTATE, 374); //rotate and disappear
-                        Timer = 2000;
-                        me->RemoveAurasDueToSpell(SPELL_SUBMERGE);
-                    }
-                    else
-                    {
-                        MergeThreatList(Essence);
-                        Essence->RemoveAllAuras();
-                        Essence->DeleteThreatList();
-                        Essence->GetMotionMaster()->MoveFollow(me, 0, 0);
-                        return;
+                        if (Essence->IsWithinDistInMap(me, 10))
+                        {
+                            Essence->SetUInt32Value(UNIT_NPC_EMOTESTATE, 374); //rotate and disappear
+                            Timer = 2000;
+                            me->RemoveAurasDueToSpell(SPELL_SUBMERGE);
+                        }
+                        else
+                        {
+                            MergeThreatList(Essence);
+                            Essence->RemoveAllAuras();
+                            Essence->DeleteThreatList();
+                            Essence->GetMotionMaster()->MoveFollow(me, 0, 0);
+                            return;
+                        }
                     }
                     break;
                 case 5:
-                    if (Phase == 1)
+                    if (Essence)
                     {
-                        Essence->AI()->Talk(SUFF_SAY_AFTER);
+                        if (Phase == 1)
+                        {
+                            Essence->AI()->Talk(SUFF_SAY_AFTER);
+                        }
+                        else
+                        {
+                            Essence->AI()->Talk(DESI_SAY_AFTER);
+                        }
+                        Essence->DespawnOrUnsummon();
                     }
-                    else
-                    {
-                        Essence->AI()->Talk(DESI_SAY_AFTER);
-                    }
-                    Essence->DespawnOrUnsummon();
                     me->SetUInt32Value(UNIT_NPC_EMOTESTATE, 0);
                     EssenceGUID = 0;
                     SoulCount = 0;

src/server/scripts/Spells/spell_pet.cpp

@@ -941,6 +941,7 @@ public:
                 if (itr != pet->ToPet()->m_spells.end()) // If pet has Wild Hunt
                 {
                     SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(itr->first); // Then get the SpellProto and add the dummy effect value
+                    ASSERT(spellInfo);
                     mod += CalculatePct(1.0f, spellInfo->Effects[EFFECT_1].CalcValue());
                 }
 
@@ -971,6 +972,7 @@ public:
                 if (itr != pet->ToPet()->m_spells.end()) // If pet has Wild Hunt
                 {
                     SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(itr->first); // Then get the SpellProto and add the dummy effect value
+                    ASSERT(spellInfo);
                     mod += CalculatePct(1.0f, spellInfo->Effects[EFFECT_1].CalcValue());
                 }
 

src/server/scripts/Spells/spell_priest.cpp

@@ -237,6 +237,7 @@ class spell_pri_glyph_of_prayer_of_healing : public SpellScriptLoader
                 PreventDefaultAction();
 
                 SpellInfo const* triggeredSpellInfo = sSpellMgr->GetSpellInfo(SPELL_PRIEST_GLYPH_OF_PRAYER_OF_HEALING_HEAL);
+                ASSERT(triggeredSpellInfo);
                 int32 heal = int32(CalculatePct(int32(eventInfo.GetHealInfo()->GetHeal()), aurEff->GetAmount()) / triggeredSpellInfo->GetMaxTicks());
                 GetTarget()->CastCustomSpell(SPELL_PRIEST_GLYPH_OF_PRAYER_OF_HEALING_HEAL, SPELLVALUE_BASE_POINT0, heal, eventInfo.GetProcTarget(), true, NULL, aurEff);
             }

src/server/scripts/Spells/spell_rogue.cpp

@@ -429,6 +429,7 @@ class spell_rog_preparation : public SpellScriptLoader
                 for (SpellCooldowns::const_iterator itr = cm.begin(); itr != cm.end();)
                 {
                     SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(itr->first);
+                    ASSERT(spellInfo);
 
                     if (spellInfo->SpellFamilyName == SPELLFAMILY_ROGUE)
                     {

src/server/scripts/Spells/spell_warlock.cpp

@@ -271,6 +271,7 @@ class spell_warl_demonic_circle_summon : public SpellScriptLoader
                     // If not in range remove the WARLOCK_DEMONIC_CIRCLE_ALLOW_CAST.
 
                     SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(SPELL_WARLOCK_DEMONIC_CIRCLE_TELEPORT);
+                    ASSERT(spellInfo);
 
                     if (GetTarget()->IsWithinDist(circle, spellInfo->GetMaxRange(true)))
                     {
@@ -353,6 +354,7 @@ class spell_warl_demonic_empowerment : public SpellScriptLoader
                     if (targetCreature->IsPet())
                     {
                         CreatureTemplate const* ci = sObjectMgr->GetCreatureTemplate(targetCreature->GetEntry());
+                        ASSERT(ci);
                         switch (ci->family)
                         {
                             case CREATURE_FAMILY_SUCCUBUS:
@@ -361,6 +363,7 @@ class spell_warl_demonic_empowerment : public SpellScriptLoader
                             case CREATURE_FAMILY_VOIDWALKER:
                             {
                                 SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(SPELL_WARLOCK_DEMONIC_EMPOWERMENT_VOIDWALKER);
+                                ASSERT(spellInfo);
                                 int32 hp = int32(targetCreature->CountPctFromMaxHealth(GetCaster()->CalculateSpellDamage(targetCreature, spellInfo, 0)));
                                 targetCreature->CastCustomSpell(targetCreature, SPELL_WARLOCK_DEMONIC_EMPOWERMENT_VOIDWALKER, &hp, NULL, NULL, true);
                                 //unitTarget->CastSpell(unitTarget, 54441, true);

src/server/scripts/Spells/spell_warrior.cpp

@@ -274,6 +274,7 @@ class spell_warr_deep_wounds : public SpellScriptLoader
                     damage = target->SpellDamageBonusTaken(caster, GetSpellInfo(), damage, SPELL_DIRECT_DAMAGE);
 
                     SpellInfo const* spellInfo = sSpellMgr->GetSpellInfo(SPELL_WARRIOR_DEEP_WOUNDS_RANK_PERIODIC);
+                    ASSERT(spellInfo);
                     uint32 ticks = spellInfo->GetDuration() / spellInfo->Effects[EFFECT_0].Amplitude;
 
                     // Add remaining ticks to damage done