Fix a pool usage bug noticed by Brane.
Fix a pool usage bug noticed by Brane.

* subversion/libsvn_fs/bdb/txn-table.c
  (svn_fs__get_txn_list): Track DBTs in interation subpool.

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