a bad fix for a 500 on notification show when the post is deleted

app/helpers/notifications_helper.rb

@@ -8,7 +8,12 @@ module NotificationsHelper
     when 'new_request'
       translation
     when 'comment_on_post'
-       "#{translation} #{link_to t('notifications.post'), object_path(Comment.first(:id => note.target_id).post)}".html_safe
+      comment = Comment.first(:id => note.target_id)
+      if comment
+       "#{translation} #{link_to t('notifications.post'), object_path(comment.post)}".html_safe
+      else
+        "#{translation} #{t('notifications.deleted')} #{t('notifications.post')}"
+      end
     else
     end
   end

config/locales/diaspora/en.yml

@@ -188,6 +188,7 @@ en:
       new_request: "offered to share with you."
       comment_on_post: "commented on your"
       post: 'post'
+      deleted: 'deleted'
       index:
         notifications: "Notifications"
   users: