add support for ecommerce 4.x

for this module to work with latest ecommerce (alpha 11) add this function to the module:

/**
  Fix by Nabulaer
  add support for ecommerce 4.x
*/
 function ec_nodeaccess_ec_txn_workflow($txn, $orig) {
  if($txn->workflow == EC_WORKFLOW_COMPLETED ){     
          $update_transactions = false;  // only turn this to true if the transaction contains a Node Access Product
      // Go through each of the products purchased.
     
       $items = (array)$txn->items ;  
      for ($i = 0; $i < count($items); $i++) {
        $node =& $items[$i]; // easy referencing
        $settings = ec_nodeaccess_get_nap_settings($node->nid);
        if ($settings != false) {  //if the nid belongs to a NAP
          $update_transactions = true;
          if ($node->schedule['expiry']) { //if there is an expiry date
            $expiry = strftime('%Y-%m-%d %H:%M:%S', $node->schedule['expiry']);
          }
          else {  // no expiry date
            $expiry = '7000-1-1 12:00:00';
          }
          if (db_query("INSERT INTO {ec_nodeaccess_purchases} (txn_id, product_nid, expiry_date) VALUES (%d, %d, '%s')", $txn->txnid, $node->nid,  $expiry) == false) {
            drupal_set_message("There was a database error.  User ". ec_customer_get_uid($txn->customer) ." has not been given access by ec_nodeaccess. code: ENP", error);
          }
        }
      }
      if ($update_transactions) {  //if the transaction contains a Node Access Product
        if (db_query("INSERT INTO {ec_nodeaccess_transactions} (txn_id, uid, purchase_date) VALUES (%d, %d, '%s')", $txn->txnid, ec_customer_get_uid($txn->customer), strftime('%Y-%m-%d %H:%M:%S', $txn->changed)) == false) {
          drupal_set_message("There was a database error.  User ". ec_customer_get_uid($txn->customer) ." has not been given access by ec_nodeaccess. code: ENT", error);
        }
      }
  } 
    
 }