Admin user (uid=1) unable to do anything on invites

It would be nice if the admin user (uid = 1) or a new permission (administer invites) could manage (resend, cancel, delete) existing invites.
Currently, the test is done on the connected user and the uid of the inviter, example : (line 1186, invite.module, function invite_cancel)

function invite_cancel(&$form_state, $origin, $code) {
  ...
  // Inviter must be the current user.
  if ($invite->inviter->uid == $user->uid) {
  ...
  }
  else {
    watchdog('invite', 'Detected malicious attempt to delete an invitation.', array(), WATCHDOG_WARNING, l(t('view'), 'user/'. $user->uid));
    drupal_access_denied();
  }
}

Why not doing this in the menu entry using access callback ?