[mythtv] [patch] Fix for sluggish pause

[Chris Pinkham]

> > Whether we add a lock or not, I still think we should strongly
> > consider the change to return early from NVP::GetFrame.  Try changing
> > between 1/16 speed and paused to see why.
> 
> As long as it sleeps in GetFrame for a bit.

I assume in this case that GetFrame would be changed to a bool or int
type so the return value would indicate whether a frame was "got" or
not :) so places that expect a new frame everytime they call GetFrame
could be modified to handle not getting one.

-- 

Chris