[PATCH] wined3d: Fix ATI1 buffer size, try 2

[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=25322

Your paranoid android.


=== w864 (64 bit device) ===
device.c:4392: Test failed: cw is 0xf60, expected 0x7f.
device.c:4401: Test failed: Callback cw is 0xf60, expected 0x7f.

=== w1064 (64 bit device) ===
device.c:4392: Test failed: cw is 0xf60, expected 0x7f.
device.c:4401: Test failed: Callback cw is 0xf60, expected 0x7f.