From 2e49fc09ff37ad0d1834fcfafa037c629a54a8d6 Mon Sep 17 00:00:00 2001
From: Jeremy Kersten <jke@odoo.com>
Date: Mon, 11 May 2015 10:40:19 +0200
Subject: [PATCH] [FIX] calendar: set context if none

Avoid traceback if no context in get_recurrent_date_by_event when code do:
    context.get('xx')
---
 addons/calendar/calendar.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/addons/calendar/calendar.py b/addons/calendar/calendar.py
index 28edd84426b..45919e6b024 100644
--- a/addons/calendar/calendar.py
+++ b/addons/calendar/calendar.py
@@ -701,6 +701,9 @@ class calendar_event(osv.Model):
                 val = pytz.UTC.localize(val)
             return val.astimezone(timezone)
 
+        if context is None:
+            context = {}
+
         timezone = pytz.timezone(context.get('tz') or 'UTC')
         startdate = pytz.UTC.localize(datetime.strptime(event.start, DEFAULT_SERVER_DATETIME_FORMAT))  # Add "+hh:mm" timezone
         if not startdate: