Do not allow to proc spells if they can't stack with already active auras.

this fixes 13048 and 12292.

--HG--
branch : trunk

src/game/SpellMgr.cpp

@@ -345,6 +345,19 @@ SpellSpecific GetSpellSpecific(uint32 spellId)
             else if((spellInfo->AttributesEx2 & SPELL_ATTR_EX2_FOOD)
                 && !spellInfo->Category)
                 return SPELL_WELL_FED;
+
+			switch(spellInfo->Id)
+			{
+				case 12880: // warrior's Enrage rank 1
+                case 14201: //           Enrage rank 2
+                case 14202: //           Enrage rank 3
+                case 14203: //           Enrage rank 4
+                case 14204: //           Enrage rank 5
+                case 12292: //	         Death Wish
+					return SPELL_WARRIOR_ENRAGE;
+				break;
+				default: break;
+			}
             break;
         }
         case SPELLFAMILY_MAGE:
@@ -489,6 +502,7 @@ bool IsSingleFromSpellSpecificPerTarget(uint32 spellSpec1,uint32 spellSpec2)
         case SPELL_DRINK:
         case SPELL_FOOD:
         case SPELL_CHARM:
+		case SPELL_WARRIOR_ENRAGE:
             return spellSpec1==spellSpec2;
         case SPELL_BATTLE_ELIXIR:
             return spellSpec2==SPELL_BATTLE_ELIXIR

src/game/SpellMgr.h

@@ -295,6 +295,7 @@ enum SpellSpecific
     SPELL_DRINK             = 19,
     SPELL_FOOD              = 20,
     SPELL_CHARM             = 21,
+	SPELL_WARRIOR_ENRAGE    = 22,
 };
 
 #define SPELL_LINKED_MAX_SPELLS  200000

src/game/Unit.cpp

@@ -6894,6 +6894,18 @@ bool Unit::HandleProcTriggerSpell(Unit *pVictim, uint32 damage, Aura* triggeredB
     Item* castItem = triggeredByAura->GetCastItemGUID() && GetTypeId()==TYPEID_PLAYER
         ? ((Player*)this)->GetItemByGuid(triggeredByAura->GetCastItemGUID()) : NULL;
 
+	// check if triggering spell can stack with current target's auras (if not - don't proc)
+    AuraMap::iterator i,next;
+    for (i = m_Auras.begin(); i != m_Auras.end(); i = next)
+    {
+        next = i;
+        ++next;
+        if (!(*i).second) continue;
+		if ( (*i).second->GetSpellProto()->Id == trigger_spell_id) continue;
+        if (spellmgr.IsNoStackSpellDueToSpell(trigger_spell_id, (*i).second->GetSpellProto()->Id, (pVictim == this)))
+		    return false;
+    }
+
     // Try handle uncnown trigger spells
     if (sSpellStore.LookupEntry(trigger_spell_id)==NULL)
     switch (auraSpellInfo->SpellFamilyName)