[PATCH 4/5] dxgi: Support creating a fullscreen swapchain on d3d12.

[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=79871

Your paranoid android.


=== w10pro64_2scr (64 bit report) ===

dxgi:
dxgi.c:2754: Test failed: Got unexpected hr 0x887a0022.
dxgi.c:2757: Test failed: Got unexpected fullscreen 0.
dxgi.c:2760: Test failed: Got unexpected hr 0x887a0022.
dxgi.c:2763: Test failed: Got unexpected fullscreen 0.