--- sites/all/modules/uc_node_checkout/uc_node_checkout.module	Fri Jun 15 10:24:59 2012
+++ sites/all/modules/uc_node_checkout/uc_node_checkout.module	Fri Jun 15 12:37:26 2012
@@ -1139,7 +1139,7 @@
     $result = db_query('SELECT * FROM {uc_cart_products} WHERE data LIKE :nid', array(':nid' => '%\"node_checkout_nid\";i:' . $nid . ';%'))->fetchField();
 
     // If a matching product was found in the DB for this node...
-    if ($item = $result->fetch()) {
+    if ($result !== FALSE and $item = $result->fetch()) {
       $item->data = unserialize($item->data);
       $items[$nid] = $item;
     }