GameEvent: Defer GameEventUpdateCreatureDataInMapsWorker to map itself

Author: killerwife

src/game/GameEvents/GameEventMgr.cpp

@@ -1139,14 +1139,17 @@ struct GameEventUpdateCreatureDataInMapsWorker
 
     void operator()(Map* map)
     {
-        if (Creature* pCreature = map->GetCreature(i_guid))
+        map->GetMessager().AddMessage([guid = i_guid, data = i_data, activate = i_activate, event_data = i_event_data](Map* map)
         {
-            pCreature->UpdateEntry(i_data->id, i_data, i_activate ? i_event_data : nullptr);
+            if (Creature* pCreature = map->GetCreature(guid))
+            {
+                pCreature->UpdateEntry(data->id, data, activate ? event_data : nullptr);
 
-            // spells not casted for event remove case (sent nullptr into update), do it
-            if (!i_activate)
-                pCreature->ApplyGameEventSpells(i_event_data, false);
-        }
+                // spells not casted for event remove case (sent nullptr into update), do it
+                if (!activate)
+                    pCreature->ApplyGameEventSpells(event_data, false);
+            }
+        });
     }
 
     ObjectGuid i_guid;