A trick for a faster treeview, step 1. Patch to short circuit

A trick for a faster treeview, step 1. Patch to short circuit

Sat Dec 13 16:13:27 2003  Kristian Rietveld  <kris@gtk.org>

	A trick for a faster treeview, step 1. Patch to short circuit
	_build_tree(), inspired by Jonathan (#80868).

	* gtk/gtktreeview.c (gtk_tree_view_init): don't put _IS_LIST in
	flags by default,
	(gtk_tree_view_build_tree): don't even try to recurse when the
	model says that it is a list, remove flag unsetter,
	(gtk_tree_view_set_model): change flag setting logic.

	* gtk/gtktreemodelsort.c (gtk_tree_model_sort_get_flags):
	propagate whether or not the child model has _IS_LIST set.

	* gtk/gtktreemodelfilter.c (gtk_tree_model_filter_get_flags):
	ditto.