Fix a bug where pool memory was used after the pool was cleared.
Fix a bug where pool memory was used after the pool was cleared.

* subversion/tests/libsvn_repos/repos-test.c (dir_deltas): Get a new
  revision root for r4 rather than reusing the one obtained for r3.

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