thumbnails in Artikelvorschau deaktivieren ?

function mystique_post_thumb($size = 'post-thumbnail', $post_id = false){
  global $post, $id;
  $post_id = (int)$post_id;
  if (!$post_id) $post_id = $id;
  $image = '';


  if (has_post_thumbnail($post_id)) $image = get_the_post_thumbnail($post_id, $size);


  if(get_mystique_option('post_thumb_auto') && !$image): // get the 1st image
    $attachments = get_children(array('post_parent' => $post_id, 'post_status' => 'inherit', 'post_type' => 'attachment', 'post_mime_type' => 'image', 'order' => 'ASC', 'orderby' => 'menu_order ID'));
    if($attachments):
      $attachment = array_shift($attachments);
      $image = wp_get_attachment_image($attachment->ID, $size);
    endif;
  endif;


  if($image && !get_post_meta($post->ID, 'asides', true)):
echo '<a class="post-thumb size-'.$size.' alignleft" href="'.get_permalink($post_id).'">'.apply_filters("mystique_post_thumbnail", $image).'</a>';  
   return true;
  endif;
  return false;
}