Fix the py2exe template path problem (issue:152) again.
This patch is same with 1834:24881eaebee3 which is leaved behind by
1897:58b6784cf9f1.
# repo.py - repository base classes for mercurial
#
# Copyright 2005 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
class RepoError(Exception): pass