Moodle version 2.7.1 PHP version 5.4.31 - in menu field, if there is a value of 0 in the option list, then the value is not displayed,

code is mod\data\field\menu\field.class.php, in function display_add_field

This line does not work - if ($option) {

when $option = 0.

Variety of coding ways to correct this...