2006-02-27  Elijah Newren  <newren gmail com>

        Patch from Thomas Thurman to prevent setting cycle_windows to
        keybindings that won't work.  #329676

        * src/prefs.c (update_binding):
        Make sure that bindings which require a modifier key are set to a
        keybinding with one or else that the binding is reverted.

        * src/ui.[ch] (meta_ui_accelerator_name):
        New function