I recently installed the google-checkout-zencart-v1.2RC3. When the cart is empty, I get the following error message at the bottom of my shopping cart page:

Fatal error: Cannot redeclare selfurl() (previously declared in /public_html/crm/shop/googlecheckout/gcheckout.php:38) in /public_html/crm/shop/googlecheckout/gcheckout.php on line 37

I looked up the selfurl string in developer's toolkit, but could not find it. Looking at the gcheckout.php I commented out the selfURL function call at line 37 and the curly bracket at line 42. See my change below. Will this change break my google checkout install? BTW, doing this removed the above error from that page. Now I can't get my checkout button to show up on the checkout page. I will go back and read up on the button issue since it appears there are some posts here related to that.

PHP Code:
require_once('admin/includes/configure.php');
  require('includes/languages/' .  $_SESSION['language'] . '/' .'modules/payment/googlecheckout.php');
  require_once('includes/modules/payment/googlecheckout.php');
  //function selfURL() { 
    $s = empty($_SERVER["HTTPS"]) ? '' : ($_SERVER["HTTPS"] == "on") ? "s" : ""; 
    $protocol = strleft(strtolower($_SERVER["SERVER_PROTOCOL"]), "/").$s; 
    $port = ($_SERVER["SERVER_PORT"] == "80") ? "" : (":".$_SERVER["SERVER_PORT"]); 
    return $protocol."://".$_SERVER['SERVER_NAME'].$port.$_SERVER['REQUEST_URI']; 
 // } 
Thanks,
BlumCafe