Resolve an 1.8/trunk error when running diff on an actual only
tree conflict.

* subversion/libsvn_wc/diff_local.c
  (diff_status_callback): Don't report on actual only nodes.

* subversion/tests/cmdline/diff_tests.py
  (diff_missing_tree_conflict_victim): Remove XFail marker and extend test to
    also apply a change on a directory.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1483397 13f79535-47bb-0310-9956-ffa450edef68