FIX: fix demo project compiler error.
FIX: fix demo project compiler error.

Esdeath/YTKNetwork,takeshineshiro/YTKNetwork,jjj2mdd/YTKNetwork,yehot/YTKNetwork,jjj2mdd/YTKNetwork,guoshimeihua/YTKNetwork,juvham/YTKNetwork,nonstriater/YTKNetwork,ruiruiguo/YTKNetwork,ztchena/YTKNetwork,jaybowong/YTKNetwork,raomengyun/YTKNetwork,yuantiku/YTKNetwork,cnbin/YTKNetwork,dullgrass/YTKNetwork,yidahis/YTKNetwork,keleyundou/YTKNetwork,yimouleng/YTKNetwork,pjyin/YTKNetwork,ZhipingYang/YTKNetwork,Haidora/YTKNetwork,thuai/YTKNetwork,conanwsz/YTKNetwork,mrchenhao/YTKNetwork,lilin87788/YTKNetwork,xukuangbo/YTKNetwork,jingchunYuan/YTKNetwork,raomengyun/YTKNetwork,zhouwude/YTKNetwork,SampleLiao/YTKNetwork,iwakevin/YTKNetwork,KevinShawn/YTKNetwork,yehot/YTKNetwork,200895045/YTKNetwork,adaixiyuan/YTKNetwork,yanyuqingshi/YTKNetwork,wangjianfeng/YTKNetwork,skyline75489/YTKNetwork,wsxzk/YTKNetwork,dvan001/YTKNetwork,ForkPanda/YTKNetwork