Errors working with Ardent package and probably more

I saw in Zizaco\Entrust\EntrustRole class, line 73 there is a method like this:

```
    public function afterSave( $success,  $forced = false )
    {
        // TODO remove in a future version
        // @deprecated
        try {
            $this->permissions = json_decode($this->permissions);
        } catch(Execption $e) {}

        return true;
    }
```

The $success variable isn't used. However it causes error when working with Ardent module since when Ardent fires afterSave event, it doesn't pass the $success value. Can we make this variable not mandatory?