From e08dd117fa687a132609328bc87666b1c814d1cc Mon Sep 17 00:00:00 2001
From: Antoine Pitrou <solipsis@pitrou.net>
Date: Wed, 14 Oct 2009 18:12:54 +0000
Subject: [PATCH] Fix a py3k warning in the StringIO module (exhibited in
 test_codecencodings_cn)

---
 Lib/StringIO.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Lib/StringIO.py b/Lib/StringIO.py
index 232009fb939..054ad4c3d58 100644
--- a/Lib/StringIO.py
+++ b/Lib/StringIO.py
@@ -128,7 +128,7 @@ class StringIO:
         if self.buflist:
             self.buf += ''.join(self.buflist)
             self.buflist = []
-        if n < 0:
+        if n is None or n < 0:
             newpos = self.len
         else:
             newpos = min(self.pos+n, self.len)