mention in the docs that -1 is a valid value and what it means.

mention in the docs that -1 is a valid value and what it means.

Wed Oct 15 22:04:59 2003  Kristian Rietveld  <kris@gtk.org>

	* gtk/gtkcombobox.c (gtk_combo_box_get_active),
	(gtk_combo_box_set_active): mention in the docs that -1 is a valid
	value and what it means.

	* gtk/gtkcomboboxentry.c (gtk_combo_box_entry_init): set the active
	item to -1 (default),
	(gtk_combo_box_entry_active_changed): do nothing when the index is
	< 0.