#2 Insufficient program title escaping

[akaihola]

The title of a recorded program in my MythTV
installation contained the substring " -- ". This broke
the dvdauthor call, I got an error message stating that
a comment was not terminated, and the program name was
shown inside a comment tag:

<!-- program title -- program subtitle -->

I hand-edited the xml file and changed " -- " to " - "
and reran dvdauthor by hand, and it worked.