Core: Get rid of dirty operator workaround for ACE_Singleton class implementation

--HG--
branch : trunk

src/server/game/Entities/DynamicObject/DynamicObject.cpp

@@ -143,7 +143,7 @@ void DynamicObject::Update(uint32 p_time)
         Delete();
     }
     else
-        sScriptMgr.OnDynamicObjectUpdate(this, p_time);
+        sScriptMgr->OnDynamicObjectUpdate(this, p_time);
 }
 
 void DynamicObject::Delete()