Re: Customizing faces with `defcustom'

[Richard M. Stallman]

    I can find only one other face that has the nil value by default.
    It is `glasses-face'.  Currently it uses `:type 'symbol', so it
    has no problem.  But it would be more appropriate to use `:type 'face'
    and add nil as an explicit alternative.

Thanks.  I fixed that.