Fix a memory use after release detected by valgrind.
Fix a memory use after release detected by valgrind.

* subversion/tests/libsvn_repos/repos-test.c
  (reporter_depth_exclude): Abort txn before clearing pool.

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