memoize: fix memoize-quot for zero input effects.
memoize: fix memoize-quot for zero input effects.

mrjbq7/factor,factor/factor,mrjbq7/factor,mrjbq7/factor,factor/factor,bpollack/factor,tgunr/factor,tgunr/factor,AlexIljin/factor,bpollack/factor,factor/factor,bpollack/factor,bpollack/factor,bpollack/factor,factor/factor,bpollack/factor,mrjbq7/factor,AlexIljin/factor,mrjbq7/factor,factor/factor,bpollack/factor,AlexIljin/factor,AlexIljin/factor,tgunr/factor,mrjbq7/factor,AlexIljin/factor,tgunr/factor,tgunr/factor,AlexIljin/factor,factor/factor,tgunr/factor,AlexIljin/factor