bin/173923: [patch] save errno before calling fprintf in cpucontrol(8) error paths

[eadler at FreeBSD.org]

Synopsis: [patch] save errno before calling fprintf in cpucontrol(8) error paths

Responsible-Changed-From-To: freebsd-bugs->eadler
Responsible-Changed-By: eadler
Responsible-Changed-When: Thu Dec 20 17:55:46 UTC 2012
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=173923