[Bug 44310] WritePrivateProfileString doesn't check for flush errors

https://bugs.winehq.org/show_bug.cgi?id=44310

--- Comment #21 from Fabian Maurer  ---
I'm going to submit only the conformance test first, as my first
> attempt didn't catch Julliard's attention.

Well, it might take some more time, but splitting it into two parts can't harm,
I guess. But I'd send both patches at once, as a patchset. Just make sure to
mark the tests as todo_wine in the first patch, and remove the todo_wine with
the patch that fixes the issue.
> Fabian, may I have your permission to put your name in Signed-off-by for
> this part, along with mine? (the code is mostly yours after all)

Sure thing, but please CC me when sending it.