*Update visibility only once per update.

--HG--
branch : trunk

src/game/Unit.cpp

@@ -9959,14 +9959,26 @@ void Unit::SetVisibility(UnitVisibility x)
     m_Visibility = x;
 
     if(IsInWorld())
+        SetToNotify();
+
+    if(x == VISIBILITY_GROUP_STEALTH)
     {
+        std::list<Unit*> targets;
+        Trinity::AnyUnitInObjectRangeCheck check(this, World::GetMaxVisibleDistance());
+        Trinity::UnitListSearcher<Trinity::AnyUnitInObjectRangeCheck> searcher(targets, check);
+        VisitNearbyWorldObject(World::GetMaxVisibleDistance(), searcher);
+        for(std::list<Unit*>::iterator iter = targets.begin(); iter != targets.end(); ++iter)
+            if((*iter)->GetTypeId() == TYPEID_PLAYER)
+                ((Player*)(*iter))->m_clientGUIDs.erase(GetGUID());
+    }
+    /*{
         Map *m = GetMap();
 
         if(GetTypeId()==TYPEID_PLAYER)
             m->PlayerRelocation((Player*)this,GetPositionX(),GetPositionY(),GetPositionZ(),GetOrientation());
         else
             m->CreatureRelocation((Creature*)this,GetPositionX(),GetPositionY(),GetPositionZ(),GetOrientation());
-    }
+    }*/
 }
 
 void Unit::UpdateSpeed(UnitMoveType mtype, bool forced)