unix.linux.proc: Fix length of meminfo struct on some kernel versions.
unix.linux.proc: Fix length of meminfo struct on some kernel versions.

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