Fix the error in the forrest build that happens if there is no jar in lib/optional Thanks to Ross Gardler for reporting.
Fix the error in the forrest build that happens if there is no jar in lib/optional
Thanks to Ross Gardler for reporting.


git-svn-id: fea306228a0c821168c534b698c8fa2a33280b3b@8972 13f79535-47bb-0310-9956-ffa450edef68

apache/forrest,apache/forrest,apache/forrest,apache/forrest,apache/forrest,apache/forrest