check if subscribers exist

views/subreddit.pug

@@ -118,6 +118,7 @@ html
                 input(type="checkbox", name="nsfw", id="nsfw", checked="checked")
             input(type="submit", value="search")
         if sidebar_data
+          if sidebar_data.subscribers
             .content
               p subscribers: #{sidebar_data.subscribers.toLocaleString()}
               p users here right now: #{sidebar_data.active_user_count.toLocaleString()}