(svn_fs__new_successor_id):  remove erroneous svn_fs__track_dbt() call, which fixes the double-free() bug.
(svn_fs__new_successor_id):  remove erroneous svn_fs__track_dbt()
call, which fixes the double-free() bug.

Submitted by RADICS Peter <mitch@lbcons.net>.

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