message: mem management fix:  free old elements before freeing old element array
diff: @@ -5995,6 +5995,11 @@ void Mesh::UniformRefinement2D()
  MFEM_ABORT("unknown element type: " << el_type);
  }
  }
  +
  + for (int i = 0; i < NumOfElements; i++)
  + {
  + FreeElement(old_elements[i]);
  + }
  old_elements.DeleteAll();
  boundary.SetSize(2 * NumOfBdrElements);
  