Scripts/Icecrown Citadel: Only one Mutated Abomination can exist during Professor Putricide encounter

Scripts/Spells: Added blizzlike error messages for certain spells
Scripts/Items: Removed obsolete scripts

src/server/game/AI/ScriptedAI/ScriptedCreature.cpp

@@ -81,6 +81,33 @@ void SummonList::DespawnAll()
     }
 }
 
+void SummonList::RemoveNotExisting()
+{
+    for (iterator i = begin(); i != end();)
+    {
+        if (Unit::GetCreature(*me, *i))
+            ++i;
+        else
+            erase(i++);
+    }
+}
+
+bool SummonList::HasEntry(uint32 entry)
+{
+    for (iterator i = begin(); i != end();)
+    {
+        Creature* summon = Unit::GetCreature(*me, *i);
+        if (!summon)
+            erase(i++);
+        else if (summon->GetEntry() == entry)
+            return true;
+        else
+            ++i;
+    }
+
+    return false;
+}
+
 ScriptedAI::ScriptedAI(Creature* pCreature) : CreatureAI(pCreature),
     me(pCreature),
     IsFleeing(false),