[PATCH v2] dxgi/tests: Check that the last adapter is always WARP.

[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=79527

Your paranoid android.


=== w2008s64 (32 bit report) ===

dxgi:
dxgi.c:5607: Test failed: Got unexpected message 0x1a, hwnd 000700F4, wparam 0x18, lparam 0x7e518.