[mythtv] font char width on some osd lines

[Mark Spieth]

>It's not only 16:9 output, though.
>http://www.gossamer-threads.com/lists/mythtv/users/326427#326427
>

I think the key is videores/displayres and if this number > 1.5 you will 
notice it.
i.e. (16/9)/(352/480)=2.4 which should be very bad. (last comment in above 
thread)
(16/9)/(720/480)=1.19 which is close to 1 which should be ok. even better if 
in 4:3 (0.8) but will have extra spacing between chars.
DVB SD (16/9)/(720/576)=1.42 which is not good by not as bad as the first 
example.

the patch should make it always perfect as horizontal scaling always works 
this way but not the previous way.

mark