https://bugs.winehq.org/show_bug.cgi?id=39403
--- Comment #44 from Robert Walker bob.mt.wya@gmail.com --- (In reply to Olivier F. R. Dierick from comment #42)
I've been using the patch from comment #15 since wine 1.9.0 and it still works with current Steam client (feb 4 update).
So I've tested the patch. It applies cleanly on top of Wine Staging git... I naively thought this patch had landed in Wine-Staging already (since I've been using the Crossover hack - personally - to get 64-bit support). However the patch hasn't gone anywhere - it's just in limbo...