colspan value is wrong for subtotal row in cart checkout pane

I believe the colspan setting of 4 is incorrect for the subtotal column in checkout, thereby causing IE / Chrome to not display a right border. Changing line 620 of uc_cart_checkout_pane.inc to colspan=3 seems to solve the issue.

original:

$rows[] = array(
      'data' => array(array('data' => '<span id="subtotal-title">' . t('Subtotal:') . '</span> ' . uc_price($subtotal, $context), 'colspan' => 4, 'class' => 'subtotal')),
      'class' => 'subtotal',
    );

modified / corrected:

$rows[] = array(
      'data' => array(array('data' => '<span id="subtotal-title">' . t('Subtotal:') . '</span> ' . uc_price($subtotal, $context), 'colspan' => 3, 'class' => 'subtotal')),
      'class' => 'subtotal',
    );