Fix CRToastInteractionResponder nil block crash.
Fix CRToastInteractionResponder nil block crash.

dmiedema/CRToast,mmmilo/CRToast,hoanganh6491/CRToast,maranik/CRToast,leoschweizer/CRToast,Kevin775263419/CRToast,grzesir/CRToast,hulu001/CRToast,hoanganh6491/CRToast,gohjohn/CRToast,cnbin/CRToast,vladzz/CRToast,AdamCampbell/CRToast,Adorkable-forkable/CRToast,Kevin775263419/CRToast,Naithar/CRToast,dedelost/CRToast,perrystreetsoftware/CRToast,cruffenach/CRToast,yeahdongcn/CRToast,Trueey/CRToast,chinaljw/CRToast,iosdevvivek/CRToast,kazmasaurus/CRToast,Ashton-W/CRToast