(svn_fs__dag_clone_root): Only put the new txn root when necessary. Double doh.
(svn_fs__dag_clone_root): Only put the new txn root when necessary.
Double doh.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion