Cron jobs on Joomla triggers "Use of undefined constant JDEBUG"

I run cron jobs using 'cd $CIVI_ROOT; $PHP bin/cli.php ...'

On Joomla that triggers mails to webmaster saying

{{PHP Notice: Use of undefined constant JDEBUG - assumed 'JDEBUG' in /var/www/events/libraries/joomla/access/access.php on line 602
PHP Notice: Use of undefined constant JDEBUG - assumed 'JDEBUG' in /var/www/events/libraries/joomla/access/access.php on line 673
PHP Notice: Use of undefined constant JDEBUG - assumed 'JDEBUG' in /var/www/events/libraries/joomla/access/access.php on line 602
PHP Notice: Use of undefined constant JDEBUG - assumed 'JDEBUG' in /var/www/events/libraries/joomla/access/access.php on line 673
PHP Notice: Use of undefined constant JDEBUG - assumed 'JDEBUG' in /var/www/events/libraries/joomla/access/access.php on line 211
PHP Notice: Use of undefined constant JDEBUG - assumed 'JDEBUG' in /var/www/events/libraries/joomla/access/access.php on line 217}}

This can be remedied by the insertion of the following line at the end of cron.php:

{{define('JDEBUG', false);
}}

I have not created a patch because I don't know what the correct way to handle this platform specific change is. But the change is trivial so consider this contributed code