message: Add support for vector FE in ParGridFunction::ExchangeFaceNbrData()
  Issue reported by:
diff: @@ -232,7 +232,8 @@ void ParGridFunction::ExchangeFaceNbrData()
  auto d_send_data = send_data.Write();
  MFEM_FORALL(i, send_data.Size(),
  {
  - d_send_data[i] = d_data[d_send_ldof[i]];
  + const int ldof = d_send_ldof[i];
  + d_send_data[i] = d_data[ldof >= 0 ? ldof : -1-ldof];
  });
  bool mpi_gpu_aware = Device::GetGPUAwareMPI();
  