Add some comments for the previous crash fix. Thanks to Amit86.

src/server/game/Grids/ObjectGridLoader.cpp

@@ -207,6 +207,8 @@ void ObjectGridUnloader::Visit(GridRefManager<T> &m)
             obj->SaveRespawnTime();
         //Some creatures may summon other temp summons in CleanupsBeforeDelete()
         //So we need this even after cleaner (maybe we can remove cleaner)
+        //Example: Flame Leviathan Turret 33139 is summoned when a creature is deleted
+        //TODO: Check if that script has the correct logic. Do we really need to summons something before deleting?
         obj->CleanupsBeforeDelete();
         ///- object will get delinked from the manager when deleted
         delete obj;