BUG: Warning: array_key_exists() expects parameter 2 to be array shipping_address.php on line 407

```
Warning: array_key_exists() expects parameter 2 to be array, bool given in .../catalog/controller/extension/d_quickcheckout/shipping_address.php on line 407
```

Need to check if empty on

```
!empty($state['session']['addresses']) && 
```