WindykacjaPanel: fix bug in update_stats

SE/superedit-USERS2_WINDYKACJA_STATUS.php

@@ -3420,7 +3420,6 @@ class WindykacjaStatsHelper {
 		{// LAST_PAY_DATE
 			$lastPayDoc = $billing_docs->get_last_pay_doc();
 			if ($lastPayDoc) {
-				$lastPayDoc = $lastPayDoc->get_data();
 				$data_arr["LAST_PAY_DATE"] = $lastPayDoc->get('BILL_DATE');
 				$data_arr["LAST_PAY_VALUE"] = $lastPayDoc->get('MA');
 				if(V::get('DBG_LAST_FVAT_PAY_TERM', '', $_GET)){echo'<pre>lastPayDoc: ';print_r($lastPayDoc);echo'</pre>';}