Get AdjustWindowRect working better

[Richard Cohen]

Dmitry Timoshkov wrote:

> dlls/user/tests/win.c already has AdjustWindowRect tests,
> see test_nonclient_area. If you could add your tests there
> that would be great.
> 
Yes, I saw the tests in there.
I preferred keeping it as a separate file so that it is simple to 
understand - it just runs through all the window styles and checks 
AdjustWindowRect.  win.c is already over 2000 lines long!


Richard.