message: fixed a bug in ssc which blocks MPI communications
diff: @@ -42,7 +42,7 @@ StepStatus SscReaderNaive::BeginStep(const StepMode stepMode,
  MPI_Recv(&globalSize, 1, MPI_UNSIGNED_LONG_LONG,
  m_WriterMasterStreamRank, 0, m_StreamComm, MPI_STATUS_IGNORE);
  m_Buffer.resize(globalSize);
  - MPI_Recv(m_Buffer.data(), globalSize, MPI_UNSIGNED_LONG_LONG,
  + MPI_Recv(m_Buffer.data(), globalSize, MPI_CHAR,
  m_WriterMasterStreamRank, 0, m_StreamComm, MPI_STATUS_IGNORE);
  }
  