Following up on r1341544, read the property hash correctly for
svn diff --internal-diff -x -u COMMITTERS ^/subversion/trunk/COMMITTERS

Found by: julianf

* subversion/libsvn_client/diff.c
  (diff_repos_wc_file_target): Properly get properties from a
     const char * -> svn_string_t hash.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1444040 13f79535-47bb-0310-9956-ffa450edef68