game-of-life: use row directly in next-step.
game-of-life: use row directly in next-step.

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