[mythtv] MythMusic ComputeSize and database usage

[dave]

> > ---
> > Is their any issues with doing this or I have not ticked something that
> > would update the length field ?
> 
> What version are you running? Length should be calculated when the 
> track is first inserted into the database during a scan. AFAIK it 
> has always worked and so I can't see a reason for the length field 
> to be empty.
> 

I started with 0.18 then went to 0.19 and am now running 0.20a.

I have 3757 entries in musicmetadata and all of them have length and size 
set to zero. I have just re-scanned and the entries are still zero (I 
changed a few file names first to ensure it picked them up).