added value_changed signal which proxies for the adjustment. Cleaned

added value_changed signal which proxies for the adjustment. Cleaned

Thu Mar 29 21:20:38 2001  Mike Kestner  <mkestner@ameritech.net>

	* gtk/gtkspinbutton.c : added value_changed signal which proxies for the
	adjustment. Cleaned redundant preconditions (spin != NULL). Added
	inline API function docs.
	(gtk_spin_button_new_with_range): New convenience constructor.
	(gtk_spin_button_set_increments): New adjustment helper.
	(gtk_spin_button_set_range): New adjustment helper.

	* gtk/testgtk.c : added test of the new convenince constructor and
	value_changed signals.

docs/reference/ChangeLog
2001-03-29  Mike Kestner  <mkestner@ameritech.net>

	* gtk/tmpl/gtkspinbutton.html: killed function docs that are now
	inline.