message: In the ctor for H1_FECollection, allow dim=0 to support point meshes.
diff: @@ -1469,7 +1469,7 @@ const
  H1_FECollection::H1_FECollection(const int p, const int dim, const int btype)
  {
  MFEM_VERIFY(p >= 1, "H1_FECollection requires order >= 1.");
  - MFEM_VERIFY(dim >= 1 && dim <=3, "H1_FECollection requires 1 <= dim <= 3.");
  + MFEM_VERIFY(dim >= 0 && dim <= 3, "H1_FECollection requires 0 <= dim <= 3.");
  const int pm1 = p - 1, pm2 = pm1 - 1, pm3 = pm2 - 1;
  