Fix a problem in svnlook.py where when removing a file, the value being used for the deletion path referenced 'None' resulting in an error.
Fix a problem in svnlook.py where when removing a file, the value being used
for the deletion path referenced 'None' resulting in an error.

Patch by: Jeremy Whitlock <jcscoobyrs@gmail.com>

* tools/examples/svnlook.py
  (DiffEditor._do_diff): When a file is deleted, print its old path instead
    of trying to print its new path which is 'None'.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion