don't try to update the top_row rowref ourselves here, but just have

don't try to update the top_row rowref ourselves here, but just have

2005-06-17  Kristian Rietveld  <kris@gtk.org>

	* gtk/gtktreeview.c (validate_visible_area): don't try to update
	the top_row rowref ourselves here, but just have _dy_to_top_row()
	do it,
	(gtk_tree_view_scroll_to_cell): handle scrolling via
	validate_visible_area() if the treeview is not visible or needs
	reallocation. (#165246, Nickolay V. Shmyrev).