/posts/:id/events - fix exception when viewed by mod.

NoMethodError exception raised

    undefined method `creator' for #<PostEvent:0x007f9a298e64d8> Did you mean? creator_id
    app/views/post_events/index.html.erb:23:in `block in _app_views_post_events_index_html_erb__2088986421112502721_70150054247640'
    app/views/post_events/index.html.erb:18:in `each'
    app/views/post_events/index.html.erb:18:in `_app_views_post_events_index_html_erb__2088986421112502721_70150054247640'
    app/controllers/post_events_controller.rb:6:in `index'

app/models/post_event.rb

@@ -4,7 +4,7 @@ class PostEvent
   include ActiveModel::Serializers::Xml
 
   attr_accessor :event
-  delegate :creator_id, :reason, :is_resolved, :created_at, to: :event
+  delegate :creator, :creator_id, :reason, :is_resolved, :created_at, to: :event
 
   def self.find_for_post(post_id)
     post = Post.find(post_id)

test/functional/post_events_controller_test.rb

@@ -25,6 +25,11 @@ class PostEventsControllerTest < ActionController::TestCase
       get :index, {:post_id => @post.id}, {:user_id => CurrentUser.user.id}
       assert_response :ok      
     end
+
+    should "render for mods" do
+      get :index, {:post_id => @post.id}, {:user_id => FactoryGirl.create(:moderator_user).id }
+      assert_response :success
+    end
   end
 
   context "GET /posts/:post_id/events.xml" do