contrib/undumprevlog

--- a/contrib/undumprevlog	Wed Nov 05 01:52:46 2014 +0000
+++ b/contrib/undumprevlog	Fri Oct 17 20:49:39 2014 -0700
@@ -10,7 +10,8 @@
     util.setbinary(fp)
 
 opener = scmutil.opener('.', False)
-tr = transaction.transaction(sys.stderr.write, opener, "undump.journal")
+tr = transaction.transaction(sys.stderr.write, opener, {'store': opener},
+                             "undump.journal")
 while True:
     l = sys.stdin.readline()
     if not l: