kernel32: Add tests for SetHandleCount + make tests pass for winversions >WINNT

[Louis Lenders]

Hi Juan,
> Since we don't have the same limitation in Wine,
> applications can call it or not, but it won't have any effect.  Hence
> maintaining a version-dependent external behavior, while not behaving
> differently internally, doesn't make sense to me.

Ok, thanks for the info, then i'll just let it return 'count', that should be ok
then for apps that use this function (and fixes the bug for Street Fighter).
I'll send a new patch tomorrow.