Funny handling of background color for initial minibuffer-only frame

[Stefan Monnier]

A bug was recently introduced (within the last week or two) which is
triggered by my minibuffer-only setup.

It can be reproduced with the following steps:

   emacs -Q --eval "(setq initial-frame-alist
                          '((minibuffer . only)
                            (background-color . \"red\")))"

you should see a single frame open, with an ugly red background (rest
assured this is not the color I use ;-) where all the text is incorrectly
displayed with a white background rather than a red background.


        Stefan