[PATCH v3 0/1] MR2242: win32u: Do not set last error in wait_message() for zero count.

[Paul Gofman (＠gofman)]

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=54405

Also fixes Assassin Creed hanging on start (for a similar reason: it doesn't expect a spurious -1 last error).

There is already a fix attempt sent by Ivan Chikish in !2067 (https://gitlab.winehq.org/wine/wine/-/merge_requests/2067). But I suppose it may be fixed simpler like in this patch. wait_message() with zero count is only called from NtUserPeekMessage(). I think even if for some reason driver's MsgWaitForMultipleObjectsEx returns a real error code we still don't want to set last error here when called from PeekMessage().

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  v3: win32u: Expose and use ProcessEvents from drivers instead of MsgWaitForMultipleObjectsEx.

https://gitlab.winehq.org/wine/wine/-/merge_requests/2242