Cleanup before deleting objects when unloading grid. Fix #3922.

src/server/game/Entities/Object/Object.cpp

@@ -1273,6 +1273,8 @@ void WorldObject::setActive(bool on)
 
 void WorldObject::CleanupsBeforeDelete(bool /*finalCleanup*/)
 {
+    if (IsInWorld())
+        RemoveFromWorld();
 }
 
 void WorldObject::_Create(uint32 guidlow, HighGuid guidhigh, uint32 phaseMask)

src/server/game/Grids/ObjectGridLoader.cpp

@@ -205,6 +205,9 @@ void ObjectGridUnloader::Visit(GridRefManager<T> &m)
         // if option set then object already saved at this moment
         if (!sWorld->getBoolConfig(CONFIG_SAVE_RESPAWN_TIME_IMMEDIATELY))
             obj->SaveRespawnTime();
+        //Some creatures may summon other temp summons in CleanupsBeforeDelete()
+        //So we need this even after cleaner (maybe we can remove cleaner)
+        obj->CleanupsBeforeDelete();
         ///- object will get delinked from the manager when deleted
         delete obj;
     }
@@ -225,23 +228,18 @@ void ObjectGridStoper::Visit(CreatureMapType &m)
     }
 }
 
-void ObjectGridCleaner::Visit(CreatureMapType &m)
-{
-    for (CreatureMapType::iterator iter=m.begin(); iter != m.end(); ++iter)
-        iter->getSource()->CleanupsBeforeDelete();
-}
-
 template<class T>
 void ObjectGridCleaner::Visit(GridRefManager<T> &m)
 {
     for (typename GridRefManager<T>::iterator iter = m.begin(); iter != m.end(); ++iter)
-        iter->getSource()->RemoveFromWorld();
+        iter->getSource()->CleanupsBeforeDelete();
 }
 
 template void ObjectGridUnloader::Visit(CreatureMapType &);
 template void ObjectGridUnloader::Visit(GameObjectMapType &);
 template void ObjectGridUnloader::Visit(DynamicObjectMapType &);
 template void ObjectGridUnloader::Visit(CorpseMapType &);
+template void ObjectGridCleaner::Visit(CreatureMapType &);
 template void ObjectGridCleaner::Visit<GameObject>(GameObjectMapType &);
 template void ObjectGridCleaner::Visit<DynamicObject>(DynamicObjectMapType &);
 template void ObjectGridCleaner::Visit<Corpse>(CorpseMapType &);

src/server/game/Grids/ObjectGridLoader.h

@@ -74,7 +74,6 @@ class ObjectGridEvacuator
 class ObjectGridCleaner
 {
     public:
-        void Visit(CreatureMapType &m);
         template<class T> void Visit(GridRefManager<T> &);
 };