* subversion/libsvn_ra_serf/commit.c
  (create_proppatch_body): Don't create an unneeded
    '<D:set><D:prop></D:prop></D:set>' when committing file or directory
    property deletions, by making a bit of code conditional of the old value
    hashes.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1587093 13f79535-47bb-0310-9956-ffa450edef68