Fix deprecation warning

Author: globalcitizen

php-iban.php

@@ -584,6 +584,7 @@ function _iban_get_info($iban,$code) {
 
 # Get information from the IBAN registry by country / code combination
 function _iban_country_get_info($country,$code) {
+ if(is_null($country) || is_null($code)) { return false; }
  _iban_load_registry();
  global $_iban_registry;
  $country = strtoupper($country);