Hotfix: Ignore missing track field

schedulelib.py

@@ -100,6 +100,12 @@ def events(scheduleUrl, titlemap={}):
                     url = event.find('url').text.strip()
                 else:
                     url = ''
+
+                if event.find('track') is not None:
+                    track = event.find('track').text
+                else:
+                    track = ''
+
                 # yield a tupel with the event-id, event-title and person-names
                 yield {
                     'day': day.get('index'),
@@ -109,7 +115,7 @@ def events(scheduleUrl, titlemap={}):
                     'persons': personnames,
                     'personnames': ', '.join(personnames),
                     'room': room.attrib['name'],
-                    'track': event.find('track').text,
+                    'track': track,
                     'url': url
                 }