Fix build break.

Note that this change was already committed in trunk and should not be
merged to trunk again.

Patch by: jat
Review by: bobv (desk review)


git-svn-id: https://google-web-toolkit.googlecode.com/svn/releases/1.6@3878 8db76d5a-ed1c-0410-87a9-c151d255dfc7