hide the 'add gallery' link, if the user has no permission

If you have no galleries added, the output of the media gallery module is a text and a link to add a new gallery.
It would be nice to see no link, if the current user do not have access to it.

File: media_gallery.pages.inc
Line: 66-70

    $build['no_content'] = array(
      '#prefix' => '<p>',
      '#markup' => t('No galleries have been set up yet. <a href="@link">Add a gallery.</a>', array('@link' => url('node/add/media-gallery'))),
      '#suffix' => '</p>',
    );

A possible solution may be the following replacement code:

    $no_content_text_arg = array();
    $no_content_text = 'No galleries have been set up yet.';
    if( node_access('create', 'media-gallery') ) {
      $no_content_text .= ' <a href="@link">Add a gallery.</a>';
      $no_content_text_arg['@link'] = url('node/add/media-gallery');
    }
    $build['no_content'] = array(
      '#prefix' => '<p>',
      '#markup' => t($no_content_text, $no_content_text_arg),
      '#suffix' => '</p>',
    );