One line patch to fix http://code.google.com/p/google-web-toolkit/issues/detail?id=3370
"ant clean buildonly" used to fail

Patch by: amitmanjhi
Review by: fabbott (TBR)



git-svn-id: https://google-web-toolkit.googlecode.com/svn/trunk@5062 8db76d5a-ed1c-0410-87a9-c151d255dfc7