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

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

@@ -176,8 +176,7 @@ void DynamicObject::BuildValuesUpdate(uint8 updateType, ByteBuffer* data, Player
         return;
 
     ByteBuffer fieldBuffer;
-    UpdateMask updateMask;
-    updateMask.SetCount(m_valuesCount);
+    UpdateMaskPacketBuilder updateMask(m_valuesCount);
 
     uint32* flags = nullptr;
     uint32 visibleFlag = GetUpdateFieldData(target, flags);
@@ -214,7 +213,6 @@ void DynamicObject::BuildValuesUpdate(uint8 updateType, ByteBuffer* data, Player
         }
     }
 
-    *data << uint8(updateMask.GetBlockCount());
     updateMask.AppendToPacket(data);
     data->append(fieldBuffer);
 }