Reactor Post Thumb

/**
 * Post thumbnail
 * in format-standard
 *
 * @since 1.0.0
 */
function reactor_do_standard_thumbnail() {
    $link_titles = reactor_option('frontpage_link_titles', 0);

    if ( has_post_thumbnail() ) { ?>
        <div class="entry-thumbnail small-4 column">
        <?php if ( is_page_template('page-templates/front-page.php') && !$link_titles ) {
            the_post_thumbnail( 'thumb-150' ); ?>

<?php } elseif ( is_single()){ ;?>
        <?php } else { ;?>

                <a href="<?php the_permalink(); ?>" rel="bookmark" title="<?php the_title_attribute(); ?>"><?php the_post_thumbnail('thumb-150'); ?></a>
            <?php } ?>
        </div>
    <?php }
}
add_action('reactor_post_header', 'reactor_do_standard_thumbnail', 4);