fix : The property lib does not exist on PaymentVAT

htdocs/compta/tva/class/paymentvat.class.php

@@ -101,6 +101,13 @@ class PaymentVAT extends CommonObject
 	 */
 	public $chid;
 
+	/**
+	 * @var string lib
+	 * @deprecated
+	 * @see $label
+	 */
+	public $lib;
+
 	/**
 	 * @var integer|string datepaye
 	 */