Description:
------------
Class constructor sets a var to a value that is only assigned to an other var.


Reproduce code:
---------------
<?php
class FG_Timestamp{
	var $timestamp;
	var $limit;

	function FG_Timestamp($ts=-1)
	{
		$this->$timestamp=0;
		$this->$limit=1; 
		echo "1 val limit=".$this->$limit."<br>";
		if ($ts<0)
			$this->$timestamp=time();
		else
		 $this->$timestamp=2;
		echo "2 val limit=".$this->$limit."<br>";
	}
}
$cmp=new FG_Timestamp(0);
?>

Expected result:
----------------
1 val limit=1
2 val limit=1 

Actual result:
--------------
1 val limit=1
2 val limit=2