Small typo, code correction needed :)

In wp_shopping_cart_shortcodes.php, lines 121 and 151, the line should read:

$item_message = ($num_items == 1) ? ("Item", "wordpress-simple-paypal-shopping-cart") : ("Items", "wordpress-simple-paypal-shopping-cart");

where $num_items == 1, rather than the present $num_items <=1.

This changes 0 item to read 0 items, which is correct English.