This fixes the PHP8 warnings. Fixed #873

application/models/Logbook_model.php

@@ -1491,7 +1491,7 @@ class Logbook_model extends CI_Model {
      * $markQrz - used in ADIF import to mark QSOs as exported to QRZ Logbook when importing QSOs
      * $skipexport - used in ADIF import to skip the realtime upload to QRZ Logbook when importing QSOs from ADIF
      */
-    function import($record, $station_id = "0", $skipDuplicate, $markLotw, $dxccAdif, $markQrz, $skipexport = false) {
+	function import($record, $station_id = "0", $skipDuplicate = false, $markLotw = false, $dxccAdif = false, $markQrz = false, $skipexport = false) {
         $CI =& get_instance();
         $CI->load->library('frequency');
         $my_error = "";