cocos2d/cocos2d-x — pull request #3484 by ledyba (2013-08-26 12:44:48+00:00)
Title: Override LayerMultiplex::init() 

LayerMultiplex::create() method calls LayerMultiplex::init(),
but LayerMultiplex::init() is not overridden,
so LayerMultiplex::create() returns invalid object( _layers is not initialized).

In this pull request, I overrode init method.