message: fixed empty attribute buffer bug in wdm
diff: @@ -411,7 +411,7 @@ void WdmReader::Init()
  reinterpret_cast<int64_t *>(request.data())[0] = m_AppID;
  reinterpret_cast<int64_t *>(request.data())[1] = -3;
  std::string address = m_FullAddresses[rand() % m_FullAddresses.size()];
  - while (reply->size() < 4)
  + while (reply->size() < 6)
  {
  reply = m_MetadataTransport->Request(request, address);
  }
  