Stop 'svn diff -r rev:rev' from printing out a bunch of empty prop changes.
Stop 'svn diff -r rev:rev' from printing out a bunch of empty prop changes.

* subversion/libsvn_client/diff.c
  (diff_props_changed): only call display_prop_diffs() if some regular props
   have changed.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@841888 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion