removed extra gtk_spin_button_update calls again. unblock dnd signal

removed extra gtk_spin_button_update calls again. unblock dnd signal

Sat Jan 23 01:44:43 1999  Lars Hamann  <lars@gtk.org>

	* gtk/gtkspinbutton.c (gtk_spin_button_get_value_as_int)
	(gtk_spin_button_get_value_as_float): removed extra
 	gtk_spin_button_update calls again.
	* gtk/gtkclist.c (gtk_clist_unmap): unblock dnd signal handler if
	neccessary
	* gtk/gtknotebook.c (gtk_notebook_button_press): grab_focus before
	switch_page
	(gtk_notebook_set_shape): don't use cur_page if it's NULL.