http://bugs.winehq.org/show_bug.cgi?id=59000
--- Comment #7 from mata sutupud@yahoo.com --- It points to a 4 month old git branch:
pkgver=10.11.r72.g54238a0646c
So it "fixes" the problem because that version didn't contain the breaking changes. You could as well just have downgraded the official wine package to an earlier version that's not quite as old. The wine-git aur package doesn't seem to get a lot of updates lately.