Cache purging issue

[AussieScorpio]

I've been having an issue with the cache purging unexpectedly. I've traced the problem to the schedule_events() function where the cron job is created.

I have page_cache_length set to 0 through the admin panel which should disable the creation of the cron job for purging.

When the conditional is hit to check page_cache_length, it's returning false;
if ( isset( $config['page_cache_length'] ) && 0 === $config['page_cache_length'] )

Changing evaluation to == like below works;
if ( isset( $config['page_cache_length'] ) && 0 == $config['page_cache_length'] )

Regards

[ram108]

See the issue: #97