Description:
------------
yesterday I noticed that the following code isn't working if 
the $versions array is coming from apc (apc_fetch), as the 
internal pointer for that array isn't at the first element.
I think that we should set that, as unserialize, json_decode, 
and every other method that I can came up with sets this 
correctly.


Reproduce code:
---------------
<?php
$foo = array('bar', 'baz');
$foo2 = unserialize(serialize($foo));
$foo3 = json_decode(json_encode($foo));
apc_store('test', $foo);
$foo4 = apc_fetch('test');

var_dump(current($foo));
var_dump(current($foo2));
var_dump(current($foo3));
var_dump(current($foo4));


Expected result:
----------------
string(3) "bar"
string(3) "bar"
string(3) "bar"
string(3) "bar"

Actual result:
--------------
string(3) "bar"
string(3) "bar"
string(3) "bar"
bool(false)