Replace assertion with silent return.
Replace assertion with silent return.

Client's should generally not be calling this method directly anyway.
lukeredpath/libPusher,andreaperizzato/libPusher,andreaperizzato/libPusher,hamchapman/libPusher,hamchapman/libPusher,lukeredpath/libPusher,alignd/libPusher,alignd/libPusher,andreaperizzato/libPusher,LoyoChengdu/libPusher,lukeredpath/libPusher,LoyoChengdu/libPusher,alignd/libPusher,alignd/libPusher,LoyoChengdu/libPusher,hamchapman/libPusher,hamchapman/libPusher,lukeredpath/libPusher,LoyoChengdu/libPusher,andreaperizzato/libPusher