[YouTube] Don't throw an exception when there is no banner available on a channel#1086

TobiGr merged 2 commits intoTeamNewPipe:devTeamNewPipe/NewPipeExtractor:devfrom

AudricV:yt_no-exception-channels-without-bannerAudricV/NewPipeExtractor:yt_no-exception-channels-without-bannerCopy head branch name to clipboard