bug#5502: compile.el uses non-mode-line faces in the mode line

[Stefan Monnier]

> Here is invtest.el:

> (setq compilation-mode-hook 'k-inverse-video-hook)
> (defun k-inverse-video-hook ()
>   (set-face-attribute 'compilation-info    nil :inverse-video nil)
>   (set-face-attribute 'compilation-warning nil :inverse-video nil)
>   (set-face-attribute 'compilation-error   nil :inverse-video nil)
> )

Why do you set inverse-video to nil?  If you set it to `unspecified'
instead, it should work right.


        Stefan