Made live sources page more robust

livestreams.py

@@ -77,6 +77,8 @@ def streaming():
 		if not tree:
 			continue
 		s = tree.find("./server/application/[name='src']/live/stream/[name='%i']"%source['id'])
+		if not s:
+			continue
 		for e in s.find("client/[publishing='']").getchildren():
 			source['stat'][e.tag] = e.text
 		source['video'] = {}