only emit the signal if an interesting column changes.

only emit the signal if an interesting column changes.

Wed Jan 30 18:46:14 2002  Jonathan Blandford  <jrb@redhat.com>

	* gtk/gtkliststore.c (gtk_list_store_set_valist): only emit the
	signal if an interesting column changes.

	* gtk/gtktreestore.c: ditto.

	* gtk/gtktreeview.c (gtk_tree_view_set_cursor): change behavior so
	that it no longer grabs