Fix a pool lifetime bug.
Fix a pool lifetime bug.

* subversion/libsvn_delta/editor.c:
  (mark_parent_stable): dup the hash key into a good pool

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