Define the member variable N

N is defined in the DB_DataObject class, which this class kind of extends. So to keep a consistent interface for consumers, we need to have N defined here.

lib/arraywrapper.php

@@ -25,12 +25,14 @@ class ArrayWrapper
 {
     var $_items = null;
     var $_count = 0;
+    var $N = 0;
     var $_i = -1;
 
     function __construct($items)
     {
         $this->_items = $items;
         $this->_count = count($this->_items);
+        $this->N = $this->_count;
     }
 
     function fetch()
@@ -76,4 +78,4 @@ class ArrayWrapper
         $item =& $this->_items[$this->_i];
         return call_user_func_array(array($item, $name), $args);
     }
-}
+}