Drupal language block with only prefixes + modification for no result

gistfile1.aw

<?php
/**
 * Override the output of the default locale language switch links.
 * We only want prefixes. If no link available, go to frontpage. Better than nothing.
 */
function theme_links__locale_block(&$variables) {
  $links = $variables['links'];
  $attributes = $variables['attributes'];
  $heading = $variables['heading'];
  global $language_url;
  $output = '';

  if (count($links) > 0) {
    $output = '';

    // Treat the heading first if it is present to prepend it to the
    // list of links.
    if (!empty($heading)) {
      if (is_string($heading)) {
        // Prepare the array that will be used when the passed heading
        // is a string.
        $heading = array(
          'text' => $heading,
          // Set the default level of the heading. 
          'level' => 'h2',
        );
      }
      $output .= '<' . $heading['level'];
      if (!empty($heading['class'])) {
        $output .= drupal_attributes(array('class' => $heading['class']));
      }
      $output .= '>' . check_plain($heading['text']) . '</' . $heading['level'] . '>';
    }

    $output .= '<ul' . drupal_attributes($attributes) . '>';

    $num_links = count($links);
    $i = 1;

    foreach ($links as $key => $link) {
      $class = array($key);

      // Add first, last and active classes to the list of links to help out themers.
      if ($i == 1) {
        $class[] = 'first';
      }
      if ($i == $num_links) {
        $class[] = 'last';
      }
      if (isset($link['href']) && ($link['href'] == $_GET['q'] || ($link['href'] == '<front>' && drupal_is_front_page()))
           && (empty($link['language']) || $link['language']->language == $language_url->language)) {
        $class[] = 'active';
      }
      $output .= '<li' . drupal_attributes(array('class' => $class)) . '>';

      if (isset($link['href'])) {
        // Pass in $link as $options, they share the same keys
        $output .= l($link['language']->language, $link['href'], $link);
      }
      /*
       * Mod. here because if no translated alternative, we still want a lang link.
       * Alternative here is that it directs you to the homepage in the req. language.
       */
      elseif(!empty($link['language']->language)){
        $link['href'] = '';
        $output .= l($link['language']->language, $link['href'], $link);
      }

      $i++;
      $output .= "</li>\n";
    }

    $output .= '</ul>';
  }
  return $output;
}