Fx_popup_dialog change breaks Windows build

[Nick Roberts <nickrob@snap.net.nz>]

 > This change
 > 
 > 2005-05-24  Nick Roberts  <nickrob@snap.net.nz>
 > 
 >         * xmenu.c (Fx_popup_dialog): Add a third boolean argument to
 >         select frame title ("Question"/"Information").
 >         (xdialog_show): Use it.
 > 
 >         * lisp.h: Fx_popup_dialog can have three arguments.
 > 
 > breaks Windows (and, I suppose, Mac) builds.

I think I've fixed it now. If it does build, can you try the following
optimistic tests:

(message-box "It works!")

(let ((use-dialog-box t) (last-nonmenu-event nil))
     (yes-or-no-p "Does it work?"))

The first should have "Information" as it frame title (was "Question")
and the second should have "Question", as before.

Thanks

Nick