From 085e0944970710e458e199bb04188e2cddbf17f3 Mon Sep 17 00:00:00 2001
From: Sam <sam.saffron@gmail.com>
Date: Mon, 8 Jul 2013 15:42:55 +1000
Subject: [PATCH] 404 if a category does not exist ....

---
 app/controllers/list_controller.rb | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/app/controllers/list_controller.rb b/app/controllers/list_controller.rb
index 635d6a1dd15..69048ea828c 100644
--- a/app/controllers/list_controller.rb
+++ b/app/controllers/list_controller.rb
@@ -35,6 +35,10 @@ class ListController < ApplicationController
     if request_is_for_uncategorized?
       list = query.list_uncategorized
     else
+      if !@category
+        raise Discourse::NotFound
+        return
+      end
       guardian.ensure_can_see!(@category)
       list = query.list_category(@category)
     end