Core/SmartAI: added TARGET_THREAT_LIST, uses all units from creature's threat list as targets

- modified ACTION_CALL_CASTEDCREATUREORGO to use simple targeting

--HG--
branch : trunk

src/server/game/AI/SmartScripts/SmartScriptMgr.cpp

@@ -279,6 +279,7 @@ bool SmartAIMgr::IsTargetValid(SmartScriptHolder e)
         case SMART_TARGET_CLOSEST_PLAYER:
         case SMART_TARGET_ACTION_INVOKER_VEHICLE:
         case SMART_TARGET_OWNER_OR_SUMMONER:
+        case SMART_TARGET_THREAT_LIST:
             break;
         default:
             sLog.outErrorDb("SmartAIMgr: Not handled target_type(%u), Entry %d SourceType %u Event %u Action %u, skipped.", e.GetTargetType(), e.entryOrGuid, e.GetScriptType(), e.event_id, e.GetActionType());