Do reference counting on the user_data that is shared between multiple

Do reference counting on the user_data that is shared between multiple

Thu Jan 29 00:48:47 2004  Matthias Clasen  <maclas@gmx.de>

	* gtk/gtkactiongroup.c (gtk_action_group_add_toggle_actions_full):
	* gtk/gtkactiongroup.c (gtk_action_group_add_actions_full): Do reference
	counting on the user_data that is shared between multiple signal handlers,
	to avoid calling the destroy notify multiple times.  (#132447, Adam Hooper)