Follow up to r12075:
Follow up to r12075:

* subversion/libsvn_repos/load.c
  (parse_property_block): Document new 'actual_length' parameter.

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