*Fix a crash.

--HG--
branch : trunk

src/game/SpellAuras.cpp

@@ -848,7 +848,7 @@ void AuraEffect::ApplyModifier(bool apply, bool Real, bool changeAmount)
         (*this.*AuraHandler [m_auraName])(apply,Real, changeAmount);
 }
 
-void AuraEffect::RecalculateAmount()
+void AuraEffect::RecalculateAmount(bool applied)
 {
     Unit *caster = GetParentAura()->GetCaster();
     int32 amount = GetParentAura()->GetStackAmount() * caster->CalculateSpellDamage(m_spellProto, GetEffIndex(), GetBasePoints(), m_target);
@@ -856,9 +856,11 @@ void AuraEffect::RecalculateAmount()
     if (amount!=GetAmount())
     {
         // Auras which are applying spellmod should have removed spellmods for real
-        ApplyModifier(false,false,true);
+        if (applied)
+            ApplyModifier(false,false,true);
         SetAmount(amount);
-        ApplyModifier(true,false,true);
+        if (applied)
+            ApplyModifier(true,false,true);
     }
 }
 
@@ -1195,7 +1197,7 @@ void Aura::_RemoveAura()
     }
 }
 
-void Aura::SetStackAmount(uint8 stackAmount)
+void Aura::SetStackAmount(uint8 stackAmount, bool applied)
 {
     if (stackAmount != m_stackAmount)
     {
@@ -1204,7 +1206,7 @@ void Aura::SetStackAmount(uint8 stackAmount)
         {
             if (AuraEffect * part = GetPartAura(i))
             {
-                part->RecalculateAmount();
+                part->RecalculateAmount(applied);
             }
         }
     }

src/game/SpellAuras.h

@@ -82,7 +82,7 @@ class TRINITY_DLL_SPEC Aura
         uint32 GetProcDamage() const { return m_procDamage; }
 
         int8 GetStackAmount() const {return m_stackAmount;}
-        void SetStackAmount(uint8 num);
+        void SetStackAmount(uint8 num, bool applied = true);
         bool modStackAmount(int32 num); // return true if last charge dropped
         uint32 GetAuraStateMask(){return m_auraStateMask;}
         void SetAuraState(uint8 num){m_auraStateMask |= 1<<(num-1);}  //modifies auras' aura state (not unit!)
@@ -172,7 +172,7 @@ class TRINITY_DLL_SPEC AuraEffect
 {
     public:
         friend AuraEffect* CreateAuraEffect(Aura * parentAura, uint32 effIndex, int32 *currentBasePoints, Unit * caster, Item * castItem, Unit * formalCaster);
-        friend void Aura::SetStackAmount(uint8 stackAmount);
+        friend void Aura::SetStackAmount(uint8 stackAmount, bool applied);
         //aura handlers
         void HandleNULL(bool, bool, bool)
         {
@@ -351,7 +351,7 @@ class TRINITY_DLL_SPEC AuraEffect
         bool isAffectedOnSpell(SpellEntry const *spell) const;
 
         void ApplyModifier(bool apply, bool Real = false, bool changeAmount=false);
-        void RecalculateAmount();
+        void RecalculateAmount(bool applied = true);
         void HandleAuraEffect(bool apply);
         void ApplyAllModifiers(bool apply, bool Real);
 

src/game/Unit.cpp

@@ -3818,7 +3818,7 @@ bool Unit::AddAura(Aura *Aur, bool handleEffects)
             uint8 stackAmount = foundAura->GetStackAmount() + 1;
             if (stackAmount > aurSpellInfo->StackAmount)
                 stackAmount = aurSpellInfo->StackAmount;
-            Aur->SetStackAmount(stackAmount);
+            Aur->SetStackAmount(stackAmount, false);
             RemoveAura(foundAura, AURA_REMOVE_BY_STACK);
             return true;
         }