user32/tests: Mark built-in wndproc auto-detection behaviour as broken on Windows 8 and 10.

[Dmitry Timoshkov]

Huw Davies <huw at codeweavers.com> wrote:

> +    SendMessageW(hwnd, WM_GETTEXT, sizeof(buf) / sizeof(buf[0]), (LPARAM)buf);
> +    if (IsWindowUnicode(hwnd))
> +        ok(memcmp(buf, unistring, sizeof(unistring)) == 0, "WM_GETTEXT invalid return\n");
> +    else
> +        ok(memcmp(buf, unistring, sizeof(unistring)) != 0, "WM_GETTEXT invalid return\n");

This doesn't look right. SendMessageW(WM_GETTEXT) is supposed to always
return a unicode string regardless of wheather IsWindowUnicode() is broken
or not, otherwise a lot of applications would misbehave in weird ways.
This needs further investigation.

-- 
Dmitry.