Gold Cart 3.7.6.1 Beta 1 Upgrade Fix for WP E-Commerce

WP E-Commerce 3.7.6.1 Beta 1 throws a fatal error with activation of Gold Cart when opening the Settings tab of Store, the error is:

Fatal error: Call to undefined function nzshpcrt_listdir() in /home/public_html/wp-content/uploads/wpsc/upgrades/gold_cart_files/gold_shopping_cart.php on line 746

Good news is Jeff the ninja coder from Instinct has already released a quick patch resolving this issue which is included below:

Change the function call (around line 745) in `upgrades/gold_cart_files` from:
$gold_nzshpcrt_merchant_list = nzshpcrt_listdir($gold_gateway_directory);
to:
$gold_nzshpcrt_merchant_list = wpsc_list_dir($gold_gateway_directory);