--- a/mercurial/revlog.py	Sun Oct 29 15:09:01 2006 +0100
+++ b/mercurial/revlog.py	Sun Oct 29 16:14:02 2006 +0100
@@ -491,7 +491,7 @@
         return d
     def start(self, rev):
         if rev < 0:
-            return nullrev
+            return 0
         if self.version != REVLOGV0:
             return self.ngoffset(self.index[rev][0])
         return self.index[rev][0]