Make verify-po.py work with pre-2.3 Pythons.
Make verify-po.py work with pre-2.3 Pythons.

* tools/dev/hook-scripts/verify-po.py
  (main): Use UnicodeError instead of the subclass UnicodeDecodeError
  which is new in Python 2.3.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@851267 13f79535-47bb-0310-9956-ffa450edef68

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