Easy starter bug: implement extrac32

[Dan Kegel]

http://bugs.winehq.org/show_bug.cgi?id=18097
Sounds pretty easy... somebody already tried
to do it, but didn't finish:
http://www.winehq.org/pipermail/wine-devel/2007-July/057886.html
http://www.winehq.org/pipermail/wine-patches/2007-July/041280.html
http://www.winehq.org/pipermail/wine-patches/2007-July/041144.html
(That code was from Etersoft; I think they ship it in their
version of Wine, but got tired of trying to get it upstream.)