Description:
------------
When you pass the $this pointer by reference and change data for the object it points to, that data is not correctly updated.

Reproduce code:
---------------
function changeAddress(&$oldThing) {
    $oldThing = new Thing();
}

class Thing {
  var $data;
  public function updateData($newData) {
    ThingChanger::changeData($this,$newData);
    var_dump($this);
    var_dump($this->data);
  }
}

class ThingChanger {
  public static function changeData(&$thingToChange,$newData) {
    changeAddress($thingToChange);
    $thingToChange->data = $newData;
  }
}

$thing = new Thing();
$thing->data = "foo";
$thing->updateData("bar");

Expected result:
----------------
object(Thing)#2 (1) {
  ["data"]=>
  string(3) "bar"
}
string(3) "bar"


Actual result:
--------------
object(Thing)#2 (1) {
  ["data"]=>
  string(3) "bar"
}
string(3) "foo"