bug#6933: 24.0.50; fringe-mode value of `half' is broken

[Drew Adams]

emacs -Q
 
M-x fringe-mode
Enter `half'.
 
The fringe values (both left and right) should each be 5, according to
the code and comments.  Instead, it is still 8, as shown by
(frame-parameters).  There is no difference in behavior between `half'
and `default'.  Dunno whether this is Windows-specific.

In GNU Emacs 24.0.50.1 (i386-mingw-nt5.1.2600)
 of 2010-08-16 on 3249CTO
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (4.4) --no-opt --cflags
-Ic:/imagesupport/include'