Bug when no subtitle exists in a language

[michaelbaudino]

Addic7ed previously added a tiny yellow warning that we used to detect that no subtitle is available for the requested language. They removed it, so this gem is now retrieving a random language subtitle when the requested language has absolutely no available subtitle.

[michaelbaudino]

It seems to be inconsistent: sometimes the old yellow notification appears, sometimes not... let's just find another way to figure out if there are available subtitles or not...

[michaelbaudino]

This is fixed in the upcoming full rewrite