Bad interaction between set-fringe-style and set-window-fringes.

[Lute Kamstra]

I start Emacs with "emacs-21.3.50 -q --no-site-file" and evaluate the
following in order:

(frame-char-width) => 11
(window-fringes) => (11 11 nil)

(set-fringe-style (cons 1 1))
(window-fringes) => (5 6 nil)

(set-window-fringes nil 11 11)
(window-fringes) => (11 11 nil)

(set-fringe-style (cons 1 1))
(window-fringes) => (11 11 nil)

So after calling set-window-fringes, set-fringe-style does not work
anymore.

  Lute.