From 357406d801dabcac70d2794ac4c61c70655e704b Mon Sep 17 00:00:00 2001
From: Lance Stout <lancestout@gmail.com>
Date: Sat, 1 Sep 2012 13:56:48 -0700
Subject: [PATCH] Map <group /> elements with no content to '' instead of None.

---
 sleekxmpp/stanza/roster.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/sleekxmpp/stanza/roster.py b/sleekxmpp/stanza/roster.py
index a415c482..681efd4f 100644
--- a/sleekxmpp/stanza/roster.py
+++ b/sleekxmpp/stanza/roster.py
@@ -130,7 +130,10 @@ class RosterItem(ElementBase):
     def get_groups(self):
         groups = []
         for group in self.xml.findall('{%s}group' % self.namespace):
-            groups.append(group.text)
+            if group.text:
+                groups.append(group.text)
+            else:
+                groups.append('')
         return groups
 
     def set_groups(self, values):