[Bug 51846] Standard library call fopen(..., "wx") not recognized - causes destruction of data

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=51846

--- Comment #12 from Ted Lyngmo  ---
@Rafał Mużyło: Oh, it's not that. Piotr helped a lot via the mailing list, but
I'm not a frequent Wine user myself and didn't feel the urge to dig deeper into
fixing the bug.

@Piotr Caban: "It looks like the only problem left is fixing the tests for
older version of ucrtbase (because old versions of ucrtbase doesn't support x
mode)." - Ok, I hope my attempt at fixing the bug and adding a test can be of
some use to someone who knows how to do what you suggest. I don't :-)