Wed Feb 25 19:11:31 2004  Owen Taylor  <otaylor@redhat.com>

        * gtk/gtkradiobutton.[ch] gtk/gtkradiomenuitem.[ch]: Add a
        ::group-changed signal emitted when the radio button/menu item
        is moved from one group of radio buttons to another.
        (#79563, based partially on a patch from Padraig O'Briain)