parse CMSG_CHANGE_SEATS_ON_CONTROLLED_VEHICLE opcode in proper way

--HG--
branch : trunk

src/game/Unit.cpp

@@ -3252,18 +3252,9 @@ void Unit::_UpdateSpells( uint32 time )
             ++i;
     }
 
-    WorldPacket auras;
     for (VisibleAuraMap::iterator itr = m_visibleAuras.begin(); itr != m_visibleAuras.end(); ++itr)
         if (itr->second->IsNeedClientUpdate())
-            itr->second->ConstructAuraInfo(auras);
-
-    if(auras.wpos())
-    {
-        WorldPacket data(SMSG_AURA_UPDATE, GetPackGUID().size() + auras.wpos());
-        data.append(GetPackGUID());
-        data.append(auras);
-        SendMessageToSet(&data, true);
-    }
+            itr->second->ClientUpdate();
 
     _DeleteRemovedAuras();