[PATCH 0/1] MR7646: winegcc: Don't call strendswith() with a NULL output_name.

[Aida Jonikienė (＠DodoGTA)]

Fixes: e3bf6e5e773 ("winegcc: Store all the boolean options in global variables.")
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=58006