get elem value() for Ptr type
get elem value() for Ptr type

zj8487/xorm,lunny/xorm,vCaesar/xorm,go-xorm/xorm,zj8487/xorm,henrylee2cn/xorm,tempbottle/xorm,go-xorm/xorm,evalphobia/xorm,zileyuan/xorm,aviau/xorm,toophy/xorm,zileyuan/xorm,vCaesar/xorm,aviau/xorm,Michael2008S/xorm,henrylee2cn/xorm,Michael2008S/xorm,evalphobia/xorm,toophy/xorm,ymhhh/xorm,lunny/xorm,ymhhh/xorm,tempbottle/xorm