[mythtv] PATCH: Commercial detection/skip using blank frames

[Chris Pinkham]

> > Do you want to fix the case of GetFrameVariance(wpos) around line
> > 3450 or should I send in a patch?  AutoCommercialSkip() needs to know
> 
> Just committed a fix, look ok?

Looks good to me, and having vpos always pointing to the last decoded
frame will probably come in handy in the future.

Chris

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** Chris Pinkham                  Linux v2.2.18, Sane v1.0.4, Cajun v3.0-8 **
** cpinkham at bc2va.org                          http://www.bc2va.org/chris/ **
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