catch corrupt add-on downloads
catch corrupt add-on downloads

Arthaey/anki,florianjacob/anki,xuewenfei/anki,eduOS/anki,LucasCabello/anki,jkitching/anki,Stvad/anki,sunclx/anki,abeyer/anki,go38/anki,socialpercon/anki-1,kenjhim/anki,subfusc/anki,holycrepe/anki