hide discount form if user has no points

Hello,

On the checkout page, I don't think that it is necessary to display the Points Discount form if the current user has no point.
So I've juste added a small test in the uc_checkout_pane_uc_userpoints_discount function to no return the form

function uc_checkout_pane_uc_userpoints_discount($op, &$arg1, $arg2) {
  // get point discounts to apply to this order
  global $user;
  $curUserId = $user->uid;

  switch ($op) {
    case 'view':
			$curUserPoints = intval(userpoints_get_current_points($uid = $curUserId, $tid = NULL));
			if ($curUserPoints <= 0 ) { 
				return false;
			}
			$maxdisc = ($curUserPoints / intval(variable_get(USERPOINTS_UC_DISC, 1)));
...