Inserting empty value omit default value

When trying to make an insert query with empty value into an integer field that have a default value, the server returns an error. This was not impacting MariaDB 10.1. On the previous version, the default value worked.

Example :

INSERT INTO `events` SET `message`='Test', `userid`=2, `runbyid`=1, `subuser`='', `time`='1517003754';

Response :

#1366 - Incorrect integer value: '' for column 'subuser' at row 1

Structure :

Column=subuser Type=tinyint(1) CanBeNull=No DefaultValue=0