convert the iter to a child iter again, after doing _iter_children. It's

convert the iter to a child iter again, after doing _iter_children. It's

Sat Feb  9 22:57:43 2002  Kristian Rietveld  <kris@gtk.org>

        * gtk/gtktreemodelsort.c (gtk_tree_model_sort_build_level): convert
        the iter to a child iter again, after doing _iter_children. It's
        possible that _iter_children added some rows and updated the stamp.