godoc: bug fix (bug introduced with revision 3ee58453e961) (thanks to Chris Dollin for identifying the cause)
godoc: bug fix (bug introduced with revision 3ee58453e961)
(thanks to Chris Dollin for identifying the cause)

Fixes issue 1237.

R=rsc
CC=golang-dev
http://codereview.appspot.com/2753043
abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go,abustany/go