Core/PacketIO: Reduce size of SMSG_UPDATE_OBJECT by trimming trailing zeros in values updatemask

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

@@ -2524,8 +2524,7 @@ void GameObject::BuildValuesUpdate(uint8 updateType, ByteBuffer* data, Player* t
 
     ByteBuffer fieldBuffer;
 
-    UpdateMask updateMask;
-    updateMask.SetCount(m_valuesCount);
+    UpdateMaskPacketBuilder updateMask(m_valuesCount);
 
     uint32* flags = GameObjectUpdateFieldFlags;
     uint32 visibleFlag = UF_FLAG_PUBLIC;
@@ -2593,7 +2592,6 @@ void GameObject::BuildValuesUpdate(uint8 updateType, ByteBuffer* data, Player* t
         }
     }
 
-    *data << uint8(updateMask.GetBlockCount());
     updateMask.AppendToPacket(data);
     data->append(fieldBuffer);
 }