[pvrusb2] Terratec Grabster AV400

[Sven Barth]

Hello Mike!

I downloaded your newest snapshot, compiled and installed it.

So far video is working flawlessly! (at least I can't see any problems...)

Audio isn't working that well, as you assumed: it is in sync with the 
video, but too slow (sounds impossible ^^) as the voices are too deep.

I will have a look at the sub-device driver, but I can't promise 
anything, as I'm not a C developer...

Greetings,
Sven