[mythtv] possible bug / cosmetic in frontend watching while recording

[James Armstrong]

I have noticed this since running cvs of .17. The time / length of the 
recording shows wrong if I watch a recording while it is being recorded. 
This happens once the recording finishes. If I am watching at time 45 
minutes into a currently recording show that is at 50 minutes it shows 
correctly on the osd. If I pause the recording for a few minutes until 
it finishes recording then the osd will show the total time of the 
recording as double. If it is an hour show it will usually show 
something like 01:59:00 on the osd as the length of the recording. I 
don't know if it is on HD recordings only or on all recordings. I will 
have to test that and see if I can get any verbose logs that will help.

- James