Description:
------------
aggregate_methods_by_list fails to aggregate certain methods that are definitely not present in the object

Reproduce code:
---------------
class Absorber
{
		/**
		*   Assigns object's properties from supplied array
		*   @param array associative
		*/

	function absorb($data)
	{
		$props = get_object_vars($this);

		foreach (array_keys($props) as $prop)
		{
		    if (isset($data[$prop]))
		    {
		        $this->$prop = $data[$prop];
		    }
		}
	}
}


class User
{
	function User($id = NULL)
	{
		// doesn't work
		aggregate_methods_by_list($this, 'Absorber', array('absorb'));
		echo '<pre>Aggregation:'.print_r(aggregation_info($this),1).'</pre>';
	}
}

Expected result:
----------------
Expectation is to see the method absorb in the aggregation list, and to be available as a method.  The problem can be worked around by using 

aggregate_methods_by_regexp($this, 'Absorber', '/absorb/');

Actual result:
--------------
No methods are present in the aggregation list