Re: menu-bar-map variable

[Richard Stallman]

    (define-key lisp-interaction-mode-map [menu-bar edit] 'undefined)

    then I get:

    (local-key-binding [menu-bar])
    (keymap (edit . undefined))

    but tmm still thinks it's there because it's still in the global list

    (global-key-binding [menu-bar]):

    ...(edit "Edit" keymap (undo ...
              ^^^^

Well, that shows the bug.  The definition as `undefined'
in the local map should not just be discarded.  It should be kept,
so that it overrides the global binding.  Only at the last moment
should it be treated as no definition.