[PATCH v2 3/3] ddraw/tests: Backport test_surface_format_conversion_alpha() for ddraw4.

[Marvin]

Hi,

While running your changed tests, 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=59873

Your paranoid android.


=== w864 (64 bit report) ===

ddraw:
ddraw4.c:3362: Test failed: Failed to create surface, hr 0x887601c2.
05c0:ddraw4: unhandled exception c0000005 at 00000000004AC9E2