cmd/godoc: fixes
cmd/godoc: fixes

These appear to have been left out of the CL I submitted earlier.

R=golang-dev, r
CC=golang-dev
http://codereview.appspot.com/5759043

h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang,h8liu/golang