fixed crash on restore
fixed crash on restore

crazypoo/IAPHelper,dxd214/IAPHelper,KimBin/IAPHelper,RyanTech/IAPHelper,hanhailong/IAPHelper,thanhtrdang/IAPHelper,yzpniceboy/IAPHelper,BlessNeo/IAPHelper,xiaobodu/IAPHelper,edison9888/IAPHelper,pengleelove/IAPHelper,jonesgithub/IAPHelper,wjszf/IAPHelper,saturngod/IAPHelper,msdgwzhy6/IAPHelper,chengkaizone/IAPHelper