ensure null strings create empty lists. Fixes #513
Merge pull request #514 from roderickvd/nightly

fix extraction of subtitle stream without language tag
don't pass None values. Fixes https://github.com/RuudBurger/CouchPotatoServer/issues/3725
Merge branch 'nightly' of https://github.com/clinton-hall/nzbToMedia into nightly
Merge pull request #516 from roderickvd/nightly

Fix subtitle extraction with multiple streams
don't copy if we are forcing FR or Resolution. Fixes #513
Merge branch 'nightly' of https://github.com/clinton-hall/nzbToMedia into nightly