修复品牌商品列表页没有标题的bug

Code Review By Rock Zhang

@@ -220,7 +220,7 @@ class IndexController extends AbstractAction
         $data['goodList'] += $condition;
         $data['pageFooter'] = true;
 
-        if ($title === '') {
+        if (empty($title)) {
             $title = $domain;
         }
         $this->setTitle($title);