[Kwintv] v4l fix

[Dirk Ziegelmeier]

I'm familiar with races and locking concepts, but I currently have no idea 
_why_ the qApp->lock() fixes the v4l plugin. All painting is now done in the 
grabber thread with the event loop waiting. But what's the difference between 
posting events (thread-safe) and copying a permanent buffer into a widget 
from the event loop? And where is a race condition in there???

Ciao,
Dirk

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Dirk Ziegelmeier * dirk at ziegelmeier.net * http://www.ziegelmeier.net