2003-05-30  Murray Cumming  <murrayc@usa.net>

        * gtk/gtkalignment.[h|c]: Added 4-sided padding as properties with
        gtk_alignment_get_padding() and gtk_aligment_set_padding(). This
        uses the new private data system - see g_type_class_add_private() in
        gtk_alignment_class_init() and the use of GTK_ALIGNMENT_GET_PRIVATE().