[mythtv] Ticket #11520: Active EIT scanning will stop working if program not found in PAT

[Torbjörn Jansson]

>> 	If I understand the problem correctly -- that if tuning
>> fails, it never tries to do an EIT scan again -- then the attached
>> patch should fix the problem.  If anyone is able to test this patch and
>> report success, I will try and get it into 0.27.
>> 
>> 	John
> 
> As expected, I was able to trigger the bug by disconnecting the antenna
> from the ATSC card until the EITScanner switched to a new channel.
> This causes the ActiveScanning to stop at which point I reconnected the
> antenna.  The Active EIT scanner isn't started again unless a recording
> occurs on that card (or Live TV is selected for that channel).
> 
> I then applied the patch, and again disconnected the antenna until
> active scanning was disabled.  I then reconnected the antenna and after
> a few minutes, Active EIT scanning started again, so the patch fixes
> the problem I'm seeing.

I've also tested the patch and can confirm it fixes the problem.
EIT scanning used to stop on the same channel all the time but with this
patch it continues.