Check if featured image should be displayed

<?php get_header(); ?>
<div id="content" class="grid_9 <?php echo of_get_option('blog_sidebar_pos') ?>">
    <?php if ( have_posts() ) while ( have_posts() ) : the_post(); ?>
    <div id="post-<?php the_ID(); ?>" <?php post_class('post'); ?>>
      <article class="post-holder single-post clearfix">
        <header>
          <h1><?php the_title(); ?></h1>
        </header>

        <?php $shouldHideFeaturedImage = get_post_meta($post->ID, 'hide_featured_image', true);
            if ( $shouldHideFeaturedImage != 'yes' ) { ?>

        <?php $single_image_size = of_get_option('single_image_size'); ?>
                <?php if($single_image_size=='' || $single_image_size=='normal'){ ?>
          <?php if(has_post_thumbnail()) {
            echo '<figure class="featured-thumbnail"><span class="img-wrap">'; the_post_thumbnail(); echo '</span></figure>';
            }
          ?>
        <?php } else { ?>
          <?php if(has_post_thumbnail()) {
            echo '<figure class="featured-thumbnail large"><span class="img-wrap"><span class="f-thumb-wrap">'; the_post_thumbnail('post-thumbnail-xl'); echo '</span></span></figure>';
            }
          ?>
        <?php } ?>
      <?php } ?>

        <div class="post-content">
          <?php the_content(); ?>
          <?php wp_link_pages('before=<div class="pagination">&after=</div>'); ?>
        </div><!--.post-content-->
      </article>

    </div><!-- #post-## -->


    <nav class="oldernewer">
      <div class="older">
        <?php previous_post_link('%link', '&laquo; Previous post') ?>
      </div><!--.older-->
      <div class="newer">
        <?php next_post_link('%link', 'Next Post &raquo;') ?>
      </div><!--.newer-->
    </nav><!--.oldernewer-->

    <?php comments_template( '', true ); ?>

  <?php endwhile; /* end loop */ ?>
</div><!--#content-->
<?php get_sidebar(); ?>
<?php get_footer(); ?>