Don't chain up to the container's expose event. Instead call

Don't chain up to the container's expose event. Instead call

2002-02-13  Joe Shaw  <joe@ximian.com>

	* gtk/gtktreeitem.c (gtk_tree_item_expose): Don't chain up to the
	container's expose event.  Instead call
	gtk_tree_item_expose_child() on each child.  Avoids a failed
	g_assert() in gtk_container_propagate_expose().
	(gtk_tree_item_expose_child): Added.  Synthesize an expose event
	for our children.  Basically gtk_container_propagate_expose()
	minus the g_assert().  (#71396)