[Bug 40128] Wrong logic in print once

https://bugs.winehq.org/show_bug.cgi?id=40128

--- Comment #7 from Sergey Isakov  ---
(In reply to Sebastian Lackner from comment #4)
> As Dmitry already pointed out, the check is intentionally written like that.
> The purpose is to filter only 'Unhandled blend factor 0' messages. When
> factor != 0, the message is printed more than once.
>
> The patch was added a while ago when I was debugging an application where
> only this message was spammed very frequently.

OK, I just didn't understand your purpose.