Merge pull request #2325 from int2001/bandmap_empty_de_fix

Fixed handling of empty continent of spotter

application/models/Dxcluster_model.php

@@ -57,7 +57,7 @@ class Dxcluster_model extends CI_Model {
 					    	$singlespot->dxcc_spotter=$dxcc;
 					    }
 					    if ( ($de != '') && ($de != 'Any') && (property_exists($singlespot->dxcc_spotter,'cont')) ){	// If we have a "de continent" and a filter-wish filter on that
-						    if (strtolower($de) == strtolower($singlespot->dxcc_spotter->cont)) {
+						    if (strtolower($de) == strtolower($singlespot->dxcc_spotter->cont ?? '')) {
 							    $singlespot->worked_call = ($this->logbook_model->check_if_callsign_worked_in_logbook($singlespot->spotted, $logbooks_locations_array, $singlespot->band) == 1);
 							    array_push($spotsout,$singlespot);
 						    }