[PATCH 3/4] d3d9/tests: Accept alpha channel differences in shadow_test.

[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=30337

Your paranoid android.


=== w8 (32 bit visual) ===
visual.c:8096: Test failed: Got unexpected color 0x00ff00ff for no color attribute test.