message: fixing windows warnings
diff: @@ -30,12 +30,12 @@ void HandshakeComm(const std::string &filename, const char mode,
  auto appRankMaps = HandshakeRank(filename, mode, timeoutSeconds, localComm);
  MPI_Group worldGroup;
  MPI_Comm_group(MPI_COMM_WORLD, &worldGroup);
  - MPI_Group_incl(worldGroup, appRankMaps[0].size(), appRankMaps[0].data(),
  - &streamGroup);
  - MPI_Group_incl(worldGroup, appRankMaps[1].size(), appRankMaps[1].data(),
  - &writerGroup);
  - MPI_Group_incl(worldGroup, appRankMaps[2].size(), appRankMaps[2].data(),
  - &readerGroup);
  + MPI_Group_incl(worldGroup, static_cast<int>(appRankMaps[0].size()),
  + appRankMaps[0].data(), &streamGroup);
  + MPI_Group_incl(worldGroup, static_cast<int>(appRankMaps[1].size()),
  + appRankMaps[1].data(), &writerGroup);
  + MPI_Group_incl(worldGroup, static_cast<int>(appRankMaps[2].size()),
  + appRankMaps[2].data(), &readerGroup);
  MPI_Comm_create_group(MPI_COMM_WORLD, streamGroup, 0, &streamComm);
  MPI_Comm_create_group(MPI_COMM_WORLD, writerGroup, 0, &writerComm);
  MPI_Comm_create_group(MPI_COMM_WORLD, readerGroup, 0, &readerComm);
  