Core/Objects: Fixed linked respawn cases when linking to itself in order to prevent respawning

src/server/game/Entities/GameObject/GameObject.cpp

@@ -332,7 +332,7 @@ void GameObject::Update(uint32 diff)
                     if (linkedRespawntime)             // Can't respawn, the master is dead
                     {
                         uint64 targetGuid = sObjectMgr->GetLinkedRespawnGuid(dbtableHighGuid);
-                        if (targetGuid == GetGUID()) // if linking self, never respawn (check delayed to next day)
+                        if (targetGuid == dbtableHighGuid) // if linking self, never respawn (check delayed to next day)
                             SetRespawnTime(DAY);
                         else
                             m_respawnTime = (now > linkedRespawntime ? now : linkedRespawntime)+urand(5, MINUTE); // else copy time from master and add a little