http://bugs.winehq.org/show_bug.cgi?id=18993
--- Comment #3 from Vitaliy Margolen vitaliy@kievinfo.com 2009-12-26 11:49:21 --- (In reply to comment #2) http://wiki.winehq.org/SubmittingPatches
In short - use git, make a patch, send it to wine-patches@winehq.org