Fix for cargo on IE8
Fix for cargo on IE8

IE8 is strict about having a second argument to Array.splice; without the second argument, it silently fails, causing the worker to not get any work, and the cargo to spin infinitely.
haggholm/async,DanieleTassone/async,megawac/async,r14r-work/fork_javascript_async,moander/async,renruixi/async,ibakaidov/async,tjwudi/async,gypsydave5/async,SaiNadh001/async,Kikobeats/async,rlugojr/async,kolomiichenko/async,megawac/async,evdevgit/async,navyxie/async,sjclijie/async,zhakui/async,ariesnah/async,Qix-/async,markyen/async,evdevgit/async,FrankSunnyvale/async,jnordberg/async,llwanghong/async,markyen/async,abhishekgahlot/async,DDunc/async,zhhb/async,bjlxj2008/async,arigo-software/async,virtdb/async,beni55/async,justincy/async,wushuyi/async,llwanghong/async,r14r/fork_javascript_async,Connectlegendary/async,jaruba/async,DaAwesomeP/async,mcanthony/async,jamesjnadeau/async,SaiNadh001/async,rborisov/async,andalm/async,youprofit/async,sjclijie/async,Zhang/async,wrenth04/async,suguru03/async,xiebaochun/async,modulexcite/async,Qix-/async,mcanthony/async,hargasinski/async,Connectlegendary/async,Zhang/async,LeoYao/async,navyxie/async,jamesjnadeau/async,abhishekgahlot/async,zhakui/async,pandeysoni/async,DDunc/async,wushuyi/async,arigo-software/async,caolan/async,FrankSunnyvale/async,garysye/async,renruixi/async,bjlxj2008/async,kolomiichenko/async,KnottedRain/async,JulianVolodia/async,JulianVolodia/async,pandeysoni/async,XM-Right/async,ecasilla/async,modulexcite/async,andyburke/antisync,jaruba/async,suguru03/async,Kikobeats/async,ariesnah/async,zhhb/async,garysye/async,caolan/async,tjwudi/async,ArcadiusK/async,youprofit/async,mingqi/uclogs-async,lonely8rain/async,ezubarev/async,moander/async,jnordberg/async,LeoYao/async,DaAwesomeP/async,andyburke/antisync,chaddm/async,lonely8rain/async,Segeon-Kim/async,XM-Right/async,xiebaochun/async,r14r-work/fork_javascript_async,DanieleTassone/async,RickyDan/async,steverobb/async,beni55/async,mingqi/uclogs-async,ArcadiusK/async,ezubarev/async,scq000/async,lanffy/async,r14r/fork_javascript_async,scq000/async,hargasinski/async,carck/async,lanffy/async,gypsydave5/async,steverobb/async,rlugojr/async,RickyDan/async,pandoraui/async,andalm/async,ecasilla/async,ibakaidov/async,haggholm/async,wrenth04/async,pandoraui/async,rborisov/async,chaddm/async,justincy/async,KnottedRain/async,imjerrybao/async,imjerrybao/async,Segeon-Kim/async,carck/async,Segeon-Kim/async