d3d9/tests: Use SetRect() instead of open coding it.

[Michael Stefaniuc]

On 06/27/2016 10:16 AM, Marvin wrote:
> 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=23872
> 
> Your paranoid android.
> 
> 
> === w1064 (64 bit device) ===
> device.c:4348: Test failed: cw is 0xf60, expected 0x7f.
> device.c:4357: Test failed: Callback cw is 0xf60, expected 0x7f.
This are existing failures.

bye
	michael