[LoTW] Bugfix for sync when COL_LOTW_QSLRDATE is not set

application/models/Logbook_model.php

@@ -1672,9 +1672,13 @@ class Logbook_model extends CI_Model {
       $query = $this->db->get($this->config->item('table_name'));
       $row = $query->row();
 
+      if (isset($row)) {
         return $row->COL_LOTW_QSLRDATE;
       }
 
+      return '1900-01-01 00:00:00.000';
+    }
+
 //////////////////////////////
   // Update a QSO with eQSL QSL info
   // We could also probably use this use this: http://eqsl.cc/qslcard/VerifyQSO.txt