[PATCH] windowscodecs: Fix tiffformat test on current Windows 10.

[Dmitry Timoshkov]

Vincent Povirk <vincent at codeweavers.com> wrote:

> On current Windows 10, QueryCapability leaves the stream position at 0,
> causing the stream position test to fail, as well as a later test
> showing native fails when the stream position isn't at the start.
> I figure Windows has shown every possible behavior, so there's no point
> in testing the position, but we should set it to show that
> CreateDecoderFromStream still cares about the stream position.

The patch looks good to me.

-- 
Dmitry.