video-title-parsing: Don't set empty titles
video-title-parsing: Don't set empty titles

Try not to set empty titles when the only part of the original title
that could be parsed is the date.

GNOME/grilo-plugins,grilofw/grilo-plugins,GNOME/grilo-plugins,jasuarez/grilo-plugins,jasuarez/grilo-plugins,grilofw/grilo-plugins