Macro define parameters bug

Version: dev-master 505c0b1

```html
{define inputSubmit $ctrl, $full, $class}
	{dump}
{/define}
```

Works:
```html
{include inputSubmit $form[send], false, 'btn btn-secondary no-push'}
```

class => 'btn btn-secondary no-push'

Not:
```html
{include inputSubmit $form[send], class => 'btn btn-secondary no-push'}
```

class => null