force export txt for ciel and quadratus

htdocs/accountancy/admin/export.php

@@ -81,6 +81,9 @@ if ($action == 'update') {
 		if (! dolibarr_set_const($db, 'ACCOUNTING_EXPORT_MODELCSV', $modelcsv, 'chaine', 0, '', $conf->entity)) {
 			$error ++;
 		}
+		if ($modelcsv==AccountancyExport::$EXPORT_TYPE_QUADRATUS || $modelcsv==AccountancyExport::$EXPORT_TYPE_CIEL) {
+			dolibarr_set_const($db, 'ACCOUNTING_EXPORT_FORMAT', 'txt', 'chaine', 0, '', $conf->entity);
+		}
 	} else {
 		$error ++;
 	}