safety first

apps/amo/helpers.py

@@ -228,7 +228,7 @@ def login_link(context):
 @register.function
 @jinja2.contextfunction
 def page_title(context, title):
-    if context['WEBAPPS']:
+    if context.get('WEBAPPS'):
         return u'%s :: %s' % (smart_unicode(title), _('Web Appstore'))
     else:
         app = context['request'].APP
@@ -268,7 +268,7 @@ def impala_breadcrumbs(context, items=list(), add_default=True, crumb_size=40):
     show a list of breadcrumbs. If url is None, it won't be a link.
     Accepts: [(url, label)]
     """
-    if add_default and not context['WEBAPPS']:
+    if add_default and not context.get('WEBAPPS'):
         app = context['request'].APP
         crumbs = [(urlresolvers.reverse('i_home'), page_name(app))]
     else: