random: speedup random-integer some more.
random: speedup random-integer some more.

Better code generation by specializing on fixnum/bignum.

factor/factor,sarvex/factor-lang,slavapestov/factor,slavapestov/factor,factor/factor,mrjbq7/factor,sarvex/factor-lang,slavapestov/factor,sarvex/factor-lang,nicolas-p/factor,tgunr/factor,AlexIljin/factor,bjourne/factor,factor/factor,factor/factor,AlexIljin/factor,bpollack/factor,dch/factor,tgunr/factor,factor/factor,mrjbq7/factor,bjourne/factor,bpollack/factor,dch/factor,tgunr/factor,tgunr/factor,mrjbq7/factor,bpollack/factor,nicolas-p/factor,bjourne/factor,bjourne/factor,tgunr/factor,factor/factor,sarvex/factor-lang,AlexIljin/factor,dch/factor,AlexIljin/factor,nicolas-p/factor,bjourne/factor,bjourne/factor,tgunr/factor,slavapestov/factor,slavapestov/factor,nicolas-p/factor,nicolas-p/factor,sarvex/factor-lang,dch/factor,bjourne/factor,bpollack/factor,AlexIljin/factor,nicolas-p/factor,sarvex/factor-lang,slavapestov/factor,AlexIljin/factor,mrjbq7/factor,bpollack/factor,mrjbq7/factor,dch/factor,slavapestov/factor,AlexIljin/factor,bpollack/factor,mrjbq7/factor,bpollack/factor,sarvex/factor-lang,nicolas-p/factor,dch/factor