From d07c423b30bde6c58951089abeb01b92785c9abb Mon Sep 17 00:00:00 2001
From: Yann Leboulanger <asterix@lagaule.org>
Date: Sun, 20 Jan 2013 22:50:04 +0100
Subject: [PATCH] fix error when opening history window

---
 src/history_window.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/history_window.py b/src/history_window.py
index 74a7ccf6a..718fe318c 100644
--- a/src/history_window.py
+++ b/src/history_window.py
@@ -172,6 +172,8 @@ class HistoryWindow:
             keys.insert(0, actual_jid)
         if '' in keys:
             keys.remove('')
+        if None in keys:
+            keys.remove(None)
         # Map jid to info tuple
         # Warning : This for is time critical with big DB
         for key in keys: