[mythtv] Patch to dvbrecorder.cpp

[Taylor Jacob]

> I've seen this problem too.
> In my case the analog channel doesn't exist at all on the dvb card, there is
> no entry for it on the dvb card.
> I've checked the channels table manualy to be sure.

I know what you guys are talking about I have seen this before as well.. I don't
know if my patch will fix this, but if not I will add it to the list of things
to fix in the short term..

Taylor