dxgi:device tests crash on X64_64

[Paul Vriens]

Hi Henri,

I'm trying to fix at least the crashes on X64_64 for this test. The 
tests are done on a Windows 7 64bit VMware guest.

The strange thing is that when I crosscompile the tests as is (64bit of 
course) the tests don't crash.

When I add the following (first thing):

BOOL is_wow64;

IsWow64Process( GetCurrentProcess(), &is_wow64 );

the tests crashes at DXGID3D10CreateDevice() in create_device().

I added that IsWow64Process() just to see if I was indeed running the 
64bit version of the test.

Any idea what's going on?