Removed update incompatible with Magento

library/Zend/Controller/Router/Route.php

@@ -294,9 +294,6 @@ public function match($path, $partial = false)
         foreach ($this->_variables as $var) {
             if (!array_key_exists($var, $return)) {
                 return false;
-            } elseif ($return[$var] == '' || $return[$var] === null) {
-                // Empty variable? Replace with the default value.
-                $return[$var] = $this->_defaults[$var];
             }
         }