math: fix stack effect declaration for the neg? generic
math: fix stack effect declaration for the neg? generic

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