delay scrolling until we try to draw the window.

delay scrolling until we try to draw the window.

Wed Feb 20 16:44:05 2002  Jonathan Blandford  <jrb@redhat.com>

	* gtk/gtktreeview.c (gtk_tree_view_scroll_to_cell): delay
	scrolling until we try to draw the window.

	* gtk/gtktreeview.c (validate_visible_area): Implement
	scroll_to_cell.