message: COMP: silence compiler warning when MPI is OFF
diff: @@ -246,6 +246,7 @@ void logger_init( bool& isInitialized,
  msgfmt.insert( 0, "[<RANK>]", 8 );
  ls = new slic::SynchronizedStream( &std::cout, comm, msgfmt );
  #else
  + static_cast< void >( comm ); // to silence compiler warnings
  ls = new slic::GenericOutputStream( &std::cout, msgfmt );
  #endif
  