[PATCH 3/4] gdi32: Fix negative width/height handling in StretchBlt.

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?

Full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=43036

Your paranoid android.


=== debian9 (32 bit Wine report) ===

gdi32:
bitmap.c:3699: Test succeeded inside todo block: GdiAlphaBlend failed err 3735928559

=== debian9 (build log) ===