FIX: Error when users_on_holiday is undefined (#49)

FIX: Error when users_on_holiday is undefined (#49)

diff --git a/assets/javascripts/connectors/after-user-name/holiday-flair.js.es6 b/assets/javascripts/connectors/after-user-name/holiday-flair.js.es6
index 553d665..52e5a7f 100644
--- a/assets/javascripts/connectors/after-user-name/holiday-flair.js.es6
+++ b/assets/javascripts/connectors/after-user-name/holiday-flair.js.es6
@@ -6,6 +6,7 @@ export default {
   shouldRender(args, context) {
     return (
       context.siteSettings.calendar_enabled &&
+      context.site.users_on_holiday &&
       context.site.users_on_holiday.includes(args.user.username)
     );
   },

GitHub sha: f3bd64c9

This commit appears in #49 which was merged by markvanlan.