Handle case where star element is present but there is no count.

fix #33

Author: davidism

sopy/se_data/models/chat.py

@@ -110,6 +110,6 @@ def html_load(cls, element, room_id, ts_date=None, update=True):
             o.rendered = True
 
         stars_elem = element.find('span', class_='stars')
-        o.stars = int(stars_elem.find('span', class_='times').string) if stars_elem is not None else 0
+        o.stars = int(stars_elem.find('span', class_='times').string or 0) if stars_elem is not None else 0
 
         return o