commit: Fix window-configuration problem.

[Stephen J. Turnbull]

Stephen J. Turnbull writes:

 > I'm getting the buggy behavior on Mac OS X in `XEmacs 21.5 (beta28)
 > "fuki" f4eb31866c38+ [Lucid] (powerpc-apple-darwin8.11.0, Mule) of Mon
 > Apr 7 2008 on chibi.local' on Apple's X server.  XEmacs is up to date
 > to 279739019e5c.

NB the conflict between the hg id in the emacs-version output and the
"up-to-date" claim is due to using "./config.status" instead of
"./config.status --recheck".  I've since confirmed the result (bug
still present) with "./config.status --recheck && make beta".