message: fix bug in AggregateError with min option
diff: @@ -9085,7 +9085,7 @@ void Mesh::NonconformingRefinement(const Array<Refinement> &refinements,
  double Mesh::AggregateError(const Array<double> &elem_error,
  const int *fine, int nfine, int op)
  {
  - double error = 0.0;
  + double error = elem_error[fine[0]];
  for (int i = 0; i < nfine; i++)
  {
  MFEM_VERIFY(fine[i] < elem_error.Size(), "");
  