[MediaBundle][Twig] ImageExtension.php 

I had this exception 

An exception has been thrown during the rendering of a template ("Catchable Fatal Error: Argument 1 passed to Elcodi\MediaBundle\Twig\ImageExtension::resize() must implement interface Elcodi\MediaBundle\Entity\Interfaces\ImageInterface, null given, called in /home/aprendephp/bamboo/app/cache/dev/twig/c4/46/88a0fe2ec50f904e934b2a884537034230609872730d1e4d243fb9ea14f2.php on line 99 and defined") in src/Elcodi/StoreProductBundle/Resources/views/Product/blocks/pin.html.twig at line 19. 

These PR is to the Bundle but the pin.html.twig needs a review