govet: fix comment
govet: fix comment

R=r, r2
CC=golang-dev
http://codereview.appspot.com/3712041

Committer: Rob Pike <4dc7c9ec434ed06502767136789763ec11d2c4b7@golang.org>

pombredanne/go-deleteme,tv42/old-go,gnanderson/go,pombredanne/go-deleteme,tv42/old-go,gnanderson/go,ssrl/go,tv42/old-go,gnanderson/go,tv42/old-go,ssrl/go,tv42/old-go,tv42/old-go,dsriram/golang,gnanderson/go,h8liu/golang,apparentlymart/golang,pombredanne/go-deleteme,gnanderson/go,gnanderson/go,dsriram/golang,h8liu/golang,dsriram/golang,ssrl/go,apparentlymart/golang,dsriram/golang,ssrl/go,apparentlymart/golang,h8liu/golang,dsriram/golang,gnanderson/go,pombredanne/go-deleteme,pombredanne/go-deleteme,h8liu/golang,apparentlymart/golang,apparentlymart/golang,apparentlymart/golang,pombredanne/go-deleteme,ssrl/go,h8liu/golang,h8liu/golang,apparentlymart/golang,pombredanne/go-deleteme,ssrl/go,dsriram/golang,ssrl/go,h8liu/golang,tv42/old-go,dsriram/golang