plugins.hitbox: fix bug when checking for hosted channels
plugins.hitbox: fix bug when checking for hosted channels

melmorabity/streamlink,javiercantero/streamlink,streamlink/streamlink,chhe/streamlink,gravyboat/streamlink,wlerin/streamlink,bastimeyer/streamlink,chhe/streamlink,gravyboat/streamlink,melmorabity/streamlink,wlerin/streamlink,back-to/streamlink,beardypig/streamlink,back-to/streamlink,streamlink/streamlink,bastimeyer/streamlink,javiercantero/streamlink,beardypig/streamlink