message: Bugfix: need to set initial size of vector
diff: @@ -1566,13 +1566,13 @@ void FiniteElementSpace::RefinementOperator
  const Geometry::Type geom = mesh->GetElementBaseGeometry(k);
  const DenseMatrix &lP = localP[geom](emb.matrix);
  + subY.SetSize(lP.Height());
  +
  DofTransformation *doftrans = fespace->GetElementDofs(k, dofs);
  old_elem_dof->GetRow(emb.parent, old_dofs);
  if (!doftrans)
  {
  - subY.SetSize(lP.Height());
  -
  for (int vd = 0; vd < vdim; vd++)
  {
  dofs.Copy(vdofs);
  