Give python a chance to find "backported" modules

python 2.2.1 is perfectly capable of executing git-merge-recursive,
provided that it finds heapq and sets. All you have to do is to steal
heapq.py and sets.py from python 2.3 or newer, and drop them in your
GIT_PYTHON_PATH.

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>

git-merge-recursive.py

@@ -3,11 +3,13 @@
 # Copyright (C) 2005 Fredrik Kuivinen
 #
 
-import sys, math, random, os, re, signal, tempfile, stat, errno, traceback
+import sys
+sys.path.append('''@@GIT_PYTHON_PATH@@''')
+
+import math, random, os, re, signal, tempfile, stat, errno, traceback
 from heapq import heappush, heappop
 from sets import Set
 
-sys.path.append('''@@GIT_PYTHON_PATH@@''')
 from gitMergeCommon import *
 
 outputIndent = 0