vxdcall calling convention

[Patrik Stridvall]

> Corrects this line in winapi_check:
> win32/device.c:544: kernel32: void VxDCall(DWORD,CONTEXT86 *): calling
> convention mismatch: cdecl != stdcall

I'm not 100% sure this really is a bug.
Don't trust winapi_check too much it is very ad hoc. :-)

It might however be a bug but I never got around to test it properly.

So, have you verified that this really is correct?