misc/174910: [patch][regression] sysctl error message includes memory address instead of string

[delphij at FreeBSD.org]

Synopsis: [patch][regression] sysctl error message includes memory address instead of string

Responsible-Changed-From-To: freebsd-bugs->delphij
Responsible-Changed-By: delphij
Responsible-Changed-When: Sun Jan 13 04:21:50 UTC 2013
Responsible-Changed-Why: 
My fault.

http://www.freebsd.org/cgi/query-pr.cgi?pr=174910