bug#3280: 23.0.93; extra line after mode line when no minibuffer

1. Use this as .emacs:
(setq minibuffer-frame-alist '((minibuffer . only)))
(make-frame minibuffer-frame-alist)
(setq default-frame-alist '((minibuffer)))
 
2. Start Emacs and visit a some buffer (e.g. Dired).
 
3. With the mouse, resize the frame, to make it narrower than the menu
bar.
 
4. An empty-line space (which looks like a minibuffer or echo-area
space) opens and remains, below the mode-line.
 
5. If you turn off menu-bar mode, this space (extra line) is
removed. The problem appears only with menu-bar mode.
 
 
 
In GNU Emacs 23.0.93.1 (i386-mingw-nt5.1.2600)
 of 2009-05-02 on SOFT-MJASON
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4)'