http://bugs.winehq.org/show_bug.cgi?id=36642
--- Comment #12 from ptubbytaylor@gmail.com --- The latest patch doesn't seem to have changed the behavior any from the patch before it. I don't know C very well, but I'd imagine what needs to be done is an initial check at the start if the Async flag is bool or null, and if it null set it to boolean false.