fix : The property id_prelevement does not exist on Paiement

htdocs/compta/paiement/class/paiement.class.php

@@ -109,6 +109,11 @@ class Paiement extends CommonObject
 	 */
 	public $ext_payment_id;
 
+	/**
+	 * @var string Id of prelevement
+	 */
+	public $id_prelevement;
+
 	/**
 	 * @var string Name of external payment mode
 	 */