kern/138557: [patch] fix truncated witness sysctl string due to incorrect use of sizeof

[antoine at FreeBSD.org]

Synopsis: [patch] fix truncated witness sysctl string due to incorrect use of sizeof

Responsible-Changed-From-To: freebsd-bugs->antoine
Responsible-Changed-By: antoine
Responsible-Changed-When: Sun Sep 6 12:48:52 UTC 2009
Responsible-Changed-Why: 
Take.

http://www.freebsd.org/cgi/query-pr.cgi?pr=138557