Output the featured image with Genesis

functions.php

<?php
// Paste the code BELOW this line into your child theme functions.

/**
 * Output the featured image with Genesis
 *
 * @author Reasons to Use Genesis
 * @link http://reasonstousegenesis.com/featured-image/
 */
add_action( 'genesis_entry_content', 'rtug_featured_image' );
function rtug_featured_image() {

	$image = genesis_get_image();

	if ( $image ) {
		printf( '<a href="%s" rel="bookmark">%s</a>', get_permalink(), $image );
	}

}