mlang: Fix some more tests to pass under windows, try 2

[Dmitry Timoshkov]

"Maarten Lankhorst" <m.b.lankhorst at gmail.com> wrote:

> It disallows certain conversions now.

Please don't commit this and other mlang related patches,
they are wrong.

Maarten, if your only intent is to show clean results under
test.winehq.org that's not worth an effort without at least
understanding why the test fails and what might be a proper
fix for each failure.

-- 
Dmitry.