Make post not found redirect clearer

app/controllers/status_messages_controller.rb

@@ -102,6 +102,8 @@ class StatusMessagesController < ApplicationController
 
       respond_with @status_message
     else
+      Rails.logger.info(:event => :link_to_nonexistent_post, :ref => request.env['HTTP_REFERER'], :user_id => current_user.id, :post_id => params[:id])
+      flash[:error] = I18n.t('status_messages.show.not_found')
       redirect_to :back
     end
   end

config/locales/diaspora/en.yml

@@ -560,6 +560,7 @@ en:
     show:
       destroy: "Delete"
       permalink: "permalink"
+      not_found: "Sorry, we couldn't find that post."
     helper:
       no_message_to_display: "No message to display."
     destroy: