GROOVY-4220
Fix for the retro jar's failure on Java 1.4 due to the correct retro ReentrantLock was being overwritten by a wrong version.

git-svn-id: http://svn.codehaus.org/groovy/branches/GROOVY_1_6_X@20288 a5544e8c-8a19-0410-ba12-f9af4593a198
1 file changed