Changing encode from View Helper is not passed to EscapeHtmlAttrHelper

Ideal where using ZF2 Components on non UTF-8 encoded projects (like onto ISO-8859-1 files), because this throws a Fatal Error at Zend/Escaper/Escaper.php on line 325.

## Sample
- http://pastebin.com/8uZHm5BM
- http://pastebin.com/pwjQdFe9

Will add a Test if needed

## Stack Trace

| Nr | Function                                                                                        | Location                           |
| --- | --------------------------------------------------------------------------------- | -------------------------------- |
| 2 | Zend\Form\View\Helper\FormSelect->render( )	                              | ../zf2-select.php:12          |
| 3 | Zend\Form\View\Helper\AbstractHelper->createAttributesString( ) | ../FormSelect.php:134      |
| 4 | Zend\View\Helper\Escaper\AbstractHelper->__invoke( )                | ../AbstractHelper.php:232 |
| 5 | Zend\View\Helper\EscapeHtmlAttr->escape( )                                | ../AbstractHelper.php:49   |
| 6 | Zend\Escaper\Escaper->escapeHtmlAttr( )                                    | ../EscapeHtmlAttr.php:26  |
| 7 | Zend\Escaper\Escaper->toUtf8( )                                                   | ../Escaper.php:16             |