commit 0c342ca6850409a534e026de9f0b501d04430512
Author: Lee Rowlands <lee.rowlands@previousnext.com.au>
Date:   Wed Apr 17 11:13:56 2013 +1000

    [#dialog] Patch 39

diff --git a/core/lib/Drupal/Core/Routing/Enhancer/DialogEnhancer.php b/core/lib/Drupal/Core/Routing/Enhancer/DialogEnhancer.php
index ded14e0..8a710a8 100644
--- a/core/lib/Drupal/Core/Routing/Enhancer/DialogEnhancer.php
+++ b/core/lib/Drupal/Core/Routing/Enhancer/DialogEnhancer.php
@@ -58,5 +58,6 @@ public function enhance(array $defaults, Request $request) {
       }
       $defaults['_controller'] = $this->controller;
     }
+    return $defaults;
   }
 }