Description:
------------
Turning on zend.ze1_compatibility_mode let the zend-engine forget the values of object-properties.

Reproduce code:
---------------
ini_set("zend.ze1_compatibility_mode","On");

class heidrun {
        var $bla;
        var $blabla;
        function heidrun() {
                $this->bla="thanks heidrun";
        }
        function berta() {
                echo $this->bla;
                $this->blabla="thanks berta";
        }
        function gerda() {
                echo $this->blabla;
        }

}

$a=new heidrun();
$a->berta();
$a->gerda();
#echo serialize($a);


Expected result:
----------------
thanks heidrunthanks berta

Actual result:
--------------
there is no output

serializing the class gives
O:7:"heidrun":2:{s:3:"bla";N;s:6:"blabla";N;}

the object-properties are set, but empty