[mythtv] [bug] autoadded dvb channel on analog card

[Torbjörn Jansson]

While looking at the channels table i found something odd.
Mythtv found a new channel CH11 on my dvb card, all dvb channels have
sourceid=2 but this channel have sourceid=1 which happends to be the analog
card.

If i delete that channel and restart the backend the channel comes back and
it's still on the wrong sourceid.

This is just one channel and a channel i don't care about, but i suspect
there might be some bug that causes this and it might do this to other
channels.