Following up on r1551564, restore access to the dav properties to avoid a
regression against older DAV servers.

* subversion/libsvn_client/copy.c
  (wc_to_repos_copy): Create and update dav commit items array. Fix pointer
    argument with the right 0.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1556989 13f79535-47bb-0310-9956-ffa450edef68