bug#888: 23.0.60; window height 2 too small (after splitting)

[martin rudalics]

> I can't until I get another Windows binary - probably in about a month. But 
I'm
> sure you DTRT - thanks!

Why wait?  All you have to do is put an `and' before the penultimate
line in `window--try-to-split-window' like this (modulo some mangled
tabs):

               ;; If WINDOW is the only window on its frame and not the
               ;; minibuffer window, attempt to split it vertically
               ;; disregarding the value of `split-height-threshold'.
               (let ((split-height-threshold 0))
                 (and (window--splittable-p window)
                      (split-window window))))))))

martin