[Bug 51035] Alacritty v0.7.2 portable crashes: SetEnvironmentVariable ("some_non-existant_var", NULL) should return TRUE

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=51035

--- Comment #2 from Gijs Vermeulen  ---
Created attachment 69897
  --> https://bugs.winehq.org/attachment.cgi?id=69897
patch

Thanks for the analysis, Louis. According to my testing the current behavior
was correct on WinXP, but seems to have changed starting with Vista.

This patch fixes it, will send upstream soon.