Fixed error handling

paynl.php

@@ -88,6 +88,8 @@ function getTableSQLFields()
         return $SQLfields;
     }
 
+
+
     function plgVmOnCheckoutAdvertise($cart, &$payment_advertise)
     {
 

paynl/api/Exception.php

@@ -1,4 +1,7 @@
 <?php
+if(!class_exists('Pay_Exception')){
+  require_once __DIR__.'/../Exception.php';
+}
 class Pay_Api_Exception extends Pay_Exception{
 
 }

paynl/api/Getservice.php

@@ -1,5 +1,7 @@
 <?php
-
+if(!class_exists('Pay_Api_Exception')){
+    require_once __DIR__.'/Exception.php';
+}
 class Pay_Api_Getservice extends Pay_Api {
 
     protected $_version = 'v3';

paynl/api/Info.php

@@ -1,5 +1,7 @@
 <?php
-
+if(!class_exists('Pay_Api_Exception')){
+    require_once __DIR__.'/Exception.php';
+}
 class Pay_Api_Info extends Pay_Api {
 
     protected $_version = 'v3';

paynl/api/Start.php

@@ -2,6 +2,10 @@
 /**
  * Class to use for starting a transaction
  */
+if(!class_exists('Pay_Api_Exception')){
+    require_once __DIR__.'/Exception.php';
+}
+
 class Pay_Api_Start extends Pay_Api {
 
     protected $_version = 'v3';