PM instead of AM end_time

found out that end_time AM/PM has a bug in method convert_time.
end_time does not contain String AM or PM, it contains either 0 or 1. I wrote a quick fix in class-fws-schedule.php by adding the following after line 86:

if ($time_array[2] == 0) {
$time_12_hour = ‘AM’;
}