bug#11567: 24.0.97; WTF? ROFL! (hilarious bug)

[martin rudalics]

> I propose the following patch, which does a little more checking if
> it's likely that emacs has been opening a special frame for the
> *Completions*-buffer. With some effort you could probably still get
> emacs to iconify an unexpecting frame, but I don't think many people
> would, if not for playing hide and seek that is... ;)

Why can't we use `window--delete' instead of `iconify-frame' here?

martin