make use of g_signal_handlers_block_matched,

make use of g_signal_handlers_block_matched,

Wed Nov  1 03:43:42 2000  Tim Janik  <timj@gtk.org>

        * gtk/gtksignal.c (gtk_signal_compat_matched): make use of
        g_signal_handlers_block_matched, g_signal_handlers_unblock_matched and
        g_signal_handlers_disconnect_matched to block/unblock and disconnect
        multiple handlers respectively, instead of only treating the
        first handler found (bug reported by owen).