Fix class not found

htdocs/accountancy/supplier/lines.php

@@ -28,6 +28,7 @@ require '../../main.inc.php';
 
 require_once DOL_DOCUMENT_ROOT . '/core/class/html.formaccounting.class.php';
 require_once DOL_DOCUMENT_ROOT . '/fourn/class/fournisseur.facture.class.php';
+require_once DOL_DOCUMENT_ROOT . '/fourn/class/fournisseur.product.class.php';
 require_once DOL_DOCUMENT_ROOT . '/product/class/product.class.php';
 require_once DOL_DOCUMENT_ROOT . '/core/lib/date.lib.php';
 require_once DOL_DOCUMENT_ROOT . '/core/lib/accounting.lib.php';