Crashes for me with error in subj. when trying to start worker.

Changing /lib/ResqueScheduler.php line 226 to

$items = Resque::redis()->zrangebyscore('delayed_queue_schedule', '-inf', $at, array("limit" => array(0, 1)));

fixes it for me.

This also better corresponds to the docs in https://github.com/nicolasff/phpredis#zrangebyscore-zrevrangebyscore