[PATCH 1/2] mmdevapi/tests: Fix capture test that consistently fails on Windows 10

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
https://testbot.winehq.org/JobDetails.pl?Key=36060

Your paranoid android.


=== w1064 (64 bit capture) ===
capture.c:181: Test failed: Position 375 expected 0