Clear holiday_list before updating

Author: pinkywafer

custom_components/calendarific/__init__.py

@@ -122,6 +122,7 @@ def update(self):
         self._next_holidays = response['response']['holidays']
         self._lastupdated = datetime.now().date()
         global holiday_list
+        holiday_list = []
         for holiday in self._holidays:
             holiday_list.append(holiday['name'])
 
@@ -146,4 +147,4 @@ def holidays(self, parameters):
             if 'error' not in data:
                 data['error'] = 'Unknown error.'
 
-        return data
+        return data