Avoid fatal exceptions being thrown on download failure
Avoid fatal exceptions being thrown on download failure

Closes #4313.
johnneijzen/osu,smoogipoo/osu,NeoAdonis/osu,NeoAdonis/osu,johnneijzen/osu,UselessToucan/osu,smoogipoo/osu,naoey/osu,UselessToucan/osu,smoogipooo/osu,naoey/osu,smoogipoo/osu,naoey/osu,DrabWeb/osu,ppy/osu,ppy/osu,EVAST9919/osu,ppy/osu,DrabWeb/osu,ZLima12/osu,peppy/osu,peppy/osu,ZLima12/osu,UselessToucan/osu,EVAST9919/osu,2yangk23/osu,peppy/osu-new,2yangk23/osu,NeoAdonis/osu,DrabWeb/osu,peppy/osu