From ed95cedc365a010346f50a681656ccc2b15af079 Mon Sep 17 00:00:00 2001
From: Yann Leboulanger <asterix@lagaule.org>
Date: Sat, 16 Feb 2013 20:00:07 +0100
Subject: [PATCH] fix get_visible_range() can return None

---
 src/disco.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/disco.py b/src/disco.py
index 6dcddecc5..326823cf6 100644
--- a/src/disco.py
+++ b/src/disco.py
@@ -1905,8 +1905,10 @@ class MucBrowser(AgentBrowser):
             # Prevent a silly warning, try again in a bit.
             self._fetch_source = GObject.timeout_add(100, self._start_info_query)
             return
-        # We have to do this in a pygtk <2.8 compatible way :/
-        start, end = view.get_visible_range()
+        range_ = view.get_visible_range()
+        if not range_:
+            return
+        start, end = range_
         iter_ = self.model.get_iter(start)
         while iter_:
             if not self.model.get_value(iter_, 6):