message: fix parallel version also for tspec pointer
diff: @@ -1336,6 +1336,7 @@ void DiscreteAdaptTC::FinalizeParDiscreteTargetSpec(const ParGridFunction &t)
  ptspec_fes->FEColl(), ncomp);
  delete tspec_pgf;
  + tspec.HostReadWrite();
  tspec_pgf = new ParGridFunction(ptspec_fesv, tspec);
  tspec_gf = tspec_pgf;
  }
  