Show menu items before adding to option menu.

Show menu items before adding to option menu.

Mon Jan  8 14:06:29 2001  Jonathan Blandford  <jrb@redhat.com>

	* tests/testtreeview.c (main): Show menu items before adding to
	option menu.

	* gtk/gtktreeview.c (gtk_tree_view_set_model): Keep the columns
	around if we kill them.

	* gtk/gtktreeviewcolumn.c (gtk_tree_view_column_set_cell_data):
	Return if we pass in a NULL model.