message: Tightened scope of local MPI_Request variable.
  Per PR recommendation.
diff: @@ -132,8 +132,6 @@ void SynchronizedStream::flush()
  const int prevrank = rank-1;
  const int nextrank = rank+1;
  - MPI_Request null_request = MPI_REQUEST_NULL;
  -
  if ( rank > 0 )
  {
  // wait for signal from previous rank
  @@ -147,6 +145,7 @@ void SynchronizedStream::flush()
  // signal next rank
  if( nranks > 1 && nextrank < nranks )
  {
  + MPI_Request null_request = MPI_REQUEST_NULL;
  MPI_Isend(AXOM_NULLPTR,0,MPI_INT,nextrank,0,m_comm,&null_request);
  MPI_Request_free(&null_request);
  }
  