# HG changeset patch
# User Eric Sumner <ericsumner@fb.com>
# Date 2015-02-05 23:52:57
# Node ID de32e9881698bfe6536cee497bdff81dc928fa85
# Parent  c6666395fdd2e72c06d1f4c5fd5966cff339f388

bundle2.unpackermixin: default value for seek() whence parameter

The contract for seek() includes seeking to an offset from the beginning of the
file when whence is omitted; put this implementation in compliance.

diff --git a/mercurial/bundle2.py b/mercurial/bundle2.py
--- a/mercurial/bundle2.py
+++ b/mercurial/bundle2.py
@@ -497,7 +497,7 @@ class unpackermixin(object):
         """read exactly <size> bytes from the stream"""
         return changegroup.readexactly(self._fp, size)
 
-    def seek(self, offset, whence):
+    def seek(self, offset, whence=0):
         """move the underlying file pointer"""
         if self._seekable:
             return self._fp.seek(offset, whence)