[ASWeakSet] Properly cast kCFNull so that build settings for unit tests don't flag it (warnings as errors).
[ASWeakSet] Properly cast kCFNull so that build settings for unit tests don't flag it (warnings as errors).

Xinchi/AsyncDisplayKit,maicki/AsyncDisplayKit,garrettmoon/AsyncDisplayKit,rcancro/AsyncDisplayKit,romyilano/AsyncDisplayKit,samhsiung/AsyncDisplayKit,harryworld/AsyncDisplayKit,rcancro/AsyncDisplayKit,yufenglv/AsyncDisplayKit,hannahmbanana/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,JetZou/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,jellenbogen/AsyncDisplayKit,Xinchi/AsyncDisplayKit,nrcmedia/AsyncDisplayKit,maicki/AsyncDisplayKit,eanagel/AsyncDisplayKit,levi/AsyncDisplayKit,levi/AsyncDisplayKit,nrcmedia/AsyncDisplayKit,flovouin/AsyncDisplayKit,facebook/AsyncDisplayKit,maicki/AsyncDisplayKit,facebook/AsyncDisplayKit,lappp9/AsyncDisplayKit,garrettmoon/AsyncDisplayKit,Adlai-Holler/AsyncDisplayKit,JetZou/AsyncDisplayKit,smyrgl/AsyncDisplayKit,george-gw/AsyncDisplayKit,levi/AsyncDisplayKit,eanagel/AsyncDisplayKit,marmelroy/AsyncDisplayKit,harryworld/AsyncDisplayKit,marmelroy/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,rahul-malik/AsyncDisplayKit,flovouin/AsyncDisplayKit,lappp9/AsyncDisplayKit,Xinchi/AsyncDisplayKit,smyrgl/AsyncDisplayKit,chrisdanford/AsyncDisplayKit,Adlai-Holler/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,garrettmoon/AsyncDisplayKit,rcancro/AsyncDisplayKit,samhsiung/AsyncDisplayKit,jellenbogen/AsyncDisplayKit,maicki/AsyncDisplayKit,eanagel/AsyncDisplayKit,jellenbogen/AsyncDisplayKit,harryworld/AsyncDisplayKit,yufenglv/AsyncDisplayKit,JetZou/AsyncDisplayKit,george-gw/AsyncDisplayKit,bimawa/AsyncDisplayKit,eanagel/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,jellenbogen/AsyncDisplayKit,flovouin/AsyncDisplayKit,rmls/AsyncDisplayKit,Xinchi/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,lappp9/AsyncDisplayKit,levi/AsyncDisplayKit,bimawa/AsyncDisplayKit,rmls/AsyncDisplayKit,rahul-malik/AsyncDisplayKit,harryworld/AsyncDisplayKit,bimawa/AsyncDisplayKit,hannahmbanana/AsyncDisplayKit,rmls/AsyncDisplayKit,romyilano/AsyncDisplayKit,nrcmedia/AsyncDisplayKit,samhsiung/AsyncDisplayKit,flovouin/AsyncDisplayKit,nrcmedia/AsyncDisplayKit,george-gw/AsyncDisplayKit,facebook/AsyncDisplayKit,marmelroy/AsyncDisplayKit,Adlai-Holler/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,hannahmbanana/AsyncDisplayKit,gazreese/AsyncDisplayKit,rmls/AsyncDisplayKit,Adlai-Holler/AsyncDisplayKit,smyrgl/AsyncDisplayKit,yufenglv/AsyncDisplayKit,hannahmbanana/AsyncDisplayKit,garrettmoon/AsyncDisplayKit,romyilano/AsyncDisplayKit,yufenglv/AsyncDisplayKit,gazreese/AsyncDisplayKit,gazreese/AsyncDisplayKit,romyilano/AsyncDisplayKit,rahul-malik/AsyncDisplayKit,JetZou/AsyncDisplayKit,JetZou/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,gazreese/AsyncDisplayKit,jellenbogen/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,Adlai-Holler/AsyncDisplayKit,rmls/AsyncDisplayKit,bimawa/AsyncDisplayKit,flovouin/AsyncDisplayKit,rahul-malik/AsyncDisplayKit,rcancro/AsyncDisplayKit,maicki/AsyncDisplayKit,chrisdanford/AsyncDisplayKit,smyrgl/AsyncDisplayKit,eanagel/AsyncDisplayKit,chrisdanford/AsyncDisplayKit,marmelroy/AsyncDisplayKit,harryworld/AsyncDisplayKit,yufenglv/AsyncDisplayKit,garrettmoon/AsyncDisplayKit,rcancro/AsyncDisplayKit,facebook/AsyncDisplayKit,levi/AsyncDisplayKit,Xinchi/AsyncDisplayKit,george-gw/AsyncDisplayKit,nrcmedia/AsyncDisplayKit,hannahmbanana/AsyncDisplayKit,lappp9/AsyncDisplayKit,samhsiung/AsyncDisplayKit,chrisdanford/AsyncDisplayKit