[PATCH] d3d8, 9/tests: Use BOOL variable for ShowCursor return value (PVS-Studio)

[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=17345

Your paranoid android.


=== w1064 (64 bit device) ===
device.c:4213: Test failed: cw is 0xf60, expected 0x7f.
device.c:4222: Test failed: Callback cw is 0xf60, expected 0x7f.