fixed #3320
fixed #3320

sandyway/CocosStudioSamples,MiaoMiaosha/Cocos,webcrawler/CocoStudioSamples,webcrawler/CocoStudioSamples,MiaoMiaosha/Cocos,MiaoMiaosha/Cocos,MiaoMiaosha/Cocos,sandyway/CocosStudioSamples,chukong/CocosStudioSamples,MiaoMiaosha/Cocos,chukong/CocosStudioSamples,webcrawler/CocoStudioSamples,sandyway/CocosStudioSamples,MiaoMiaosha/Cocos,chukong/CocosStudioSamples,chukong/CocosStudioSamples,sandyway/CocosStudioSamples,MiaoMiaosha/Cocos,webcrawler/CocoStudioSamples