fixed issue with bad_subtitle_codec for external subtitles
fixed issue with bad_subtitle_codec for external subtitles

Collisionc/sickbeard_mp4_automator,Filechaser/sickbeard_mp4_automator,Collisionc/sickbeard_mp4_automator,Filechaser/sickbeard_mp4_automator,phtagn/sickbeard_mp4_automator,phtagn/sickbeard_mp4_automator