message: fix MPI guard
diff: @@ -296,6 +296,8 @@ TEST_CASE("Coarsen L2 Element","[Coarsen]")
  }
  }
  +#ifdef MFEM_USE_MPI
  +
  void RefineRandomly(ParMesh& pmesh,
  ParFiniteElementSpace& fespace, ParGridFunction& u)
  {
  @@ -419,9 +421,6 @@ void stress_parallel_coarsen(int order, Element::Type el_type, int basis_type)
  // Wx += offx;
  }
  -
  -
  -#ifdef MFEM_USE_MPI
  TEST_CASE("Parallel Coarsen Stress Test", "[Coarsen][Parallel]")
  {
  std::vector<int> orders_1d{0,1,2,3};
  