Ask neighbor, rather than cell_face, about children.

diff --git a/source/dofs/dof_tools_sparsity.cc b/source/dofs/dof_tools_sparsity.cc
index 725546c1a84fc3128c5a01c98300601649233b21..fb409110b6cde5560abfad44da35e5956e003adc 100644 (file)
--- a/source/dofs/dof_tools_sparsity.cc
+++ b/source/dofs/dof_tools_sparsity.cc
@@ -807,7 +807,7 @@ namespace DoFTools
                                         cell->periodic_neighbor_face_no (face_n):
                                         cell->neighbor_face_no (face_n);
 
-                      if (cell_face->has_children ())
+                      if (neighbor->has_children ())
                         {
                           for (unsigned int sub_nr = 0;
                                sub_nr != cell_face->n_children ();
@@ -1080,7 +1080,7 @@ namespace DoFTools
                           neighbor->is_locally_owned ())
                         continue; // (the neighbor is finer)
 
-                      if (cell_face->has_children())
+                      if (neighbor->has_children())
                         {
                           for (unsigned int sub_nr = 0;
                                sub_nr != cell_face->n_children();