Description:
------------
When an assingment is passed as a function argument that is expected to be passed by reference, an E_STRICT message is thrown: "<b>Strict Standards</b>:  Only variables should be passed by reference" and the reference is lost.

This was not the case in 5.1.1


Reproduce code:
---------------
function foo(&$a) {
    $a = 1;
}

foo($a = 0);
var_dump($a);


Expected result:
----------------
int(1)

Actual result:
--------------
int(0)