mroderick/PubSubJS — pull request #37 by krasu (2013-11-27 10:27:07+00:00)
Title: fixed topic hierarchy

If top level topic is empty (all subscribers were unsubscribered),
messages[topic] is empty Array. So function messageHasSubscribers will
return false, because topic found and have 0 subscribers, so here will
not be check for lower topic levels.

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Fixes codio/client#1784