Fixed course data for lecture page

server.py

@@ -231,7 +231,7 @@ def lecture(id):
 			''', lecture['course_id'], lecture['id'], ismod())
 	if not videos:
 		flash('Zu dieser Vorlesung wurden noch keine Videos veröffentlicht!')
-	course = query('SELECT * FROM courses WHERE id = ? AND (? OR (visible AND listed))', lecture['course_id'], ismod())
+	course = query('SELECT * FROM courses WHERE id = ? AND (? OR (visible AND listed))', lecture['course_id'], ismod())[0]
 	if not course:
 		return render_endpoint('course', 'Diese Veranstaltung existiert nicht!'), 404
 	chapters = query('SELECT * FROM chapters WHERE lecture_id = ? AND NOT deleted AND (? OR visible) ORDER BY time ASC', id, ismod())