stream.streamprocess: Close the error output stream once it has been passed to the subprocess.
stream.streamprocess: Close the error output stream once it has been passed to the subprocess.

Avoids a ResourceWarning in Python 3.

chhe/livestreamer,flijloku/livestreamer,Masaz-/livestreamer,Feverqwe/livestreamer,intact/livestreamer,jtsymon/livestreamer,charmander/livestreamer,chhe/livestreamer,okaywit/livestreamer,Saturn/livestreamer,blxd/livestreamer,charmander/livestreamer,beardypig/streamlink,melmorabity/streamlink,javiercantero/streamlink,intact/livestreamer,beardypig/streamlink,wlerin/streamlink,asermax/livestreamer,Masaz-/livestreamer,derrod/livestreamer,Klaudit/livestreamer,breunigs/livestreamer,derrod/livestreamer,chhe/streamlink,chrippa/livestreamer,back-to/streamlink,back-to/streamlink,melmorabity/streamlink,Dobatymo/livestreamer,gravyboat/streamlink,bastimeyer/streamlink,mmetak/streamlink,fishscene/streamlink,gtmanfred/livestreamer,ethanhlc/streamlink,hmit/livestreamer,programming086/livestreamer,caorong/livestreamer,mmetak/streamlink,jtsymon/livestreamer,fishscene/streamlink,streamlink/streamlink,lyhiving/livestreamer,lyhiving/livestreamer,breunigs/livestreamer,wlerin/streamlink,wolftankk/livestreamer,Feverqwe/livestreamer,wolftankk/livestreamer,ethanhlc/streamlink,hmit/livestreamer,chrippa/livestreamer,sbstp/streamlink,sbstp/streamlink,caorong/livestreamer,bastimeyer/streamlink,programming086/livestreamer,Dobatymo/livestreamer,gravyboat/streamlink,Saturn/livestreamer,okaywit/livestreamer,chhe/streamlink,Klaudit/livestreamer,flijloku/livestreamer,blxd/livestreamer,gtmanfred/livestreamer,javiercantero/streamlink,streamlink/streamlink