Trying to set the progress block with a nil identifire doesn't make sense. (#3117)
Trying to set the progress block with a nil identifire doesn't make sense. (#3117)


maicki/AsyncDisplayKit,lappp9/AsyncDisplayKit,flovouin/AsyncDisplayKit,lappp9/AsyncDisplayKit,flovouin/AsyncDisplayKit,maicki/AsyncDisplayKit,flovouin/AsyncDisplayKit,flovouin/AsyncDisplayKit,flovouin/AsyncDisplayKit,lappp9/AsyncDisplayKit,lappp9/AsyncDisplayKit,maicki/AsyncDisplayKit,maicki/AsyncDisplayKit,maicki/AsyncDisplayKit