Enable subscriptions block warning link does not always work

Just a small thing but if you changed this line in subscriptions_ui.module from
drupal_set_message(t('Enable the !module block <!link_tag_begin>here<!link_tag_end>!', array('!module' => 'Subscriptions', '!link_tag_begin' => 'a href="/admin/build/block"', '!link_tag_end' => '/a')), 'error');
to
drupal_set_message(t('Enable the !module block <!link_tag_begin>here<!link_tag_end>!', array('!module' => 'Subscriptions', '!link_tag_begin' => 'a href="'. url('admin/build/block') .'"', '!link_tag_end' => '/a')), 'error');
it would work for sites where the drupal install is not in the root directory.