kern/177165: [patch] Fixing clang warnings at /sys/geom

[hiren at FreeBSD.org]

Synopsis: [patch] Fixing clang warnings at /sys/geom

Responsible-Changed-From-To: freebsd-bugs->hiren
Responsible-Changed-By: hiren
Responsible-Changed-When: Mon Apr 29 07:11:49 UTC 2013
Responsible-Changed-Why: 
My own pr and patch.

http://www.freebsd.org/cgi/query-pr.cgi?pr=177165