message: fixup opt parsing
diff: @@ -328,7 +328,7 @@ void RunParams::parseCommandLineOptions(int argc, char** argv)
  done = true;
  } else {
  got_someting = true;
  - int gpu_block_size = ::atoi( opt );
  + int gpu_block_size = ::atoi( opt.c_str() );
  if ( gpu_block_size <= 0 ) {
  std::cout << "\nBad input:"
  << " must give --gpu_block_size POSITIVE values (int)"
  