fixed bug introduced yesterday in Data::set(), using type traits
fixed bug introduced yesterday in Data::set(), using type traits

p4lang/behavioral-model,hanw/behavioral-model,p4lang/behavioral-model,ops-p4/ops-p4dp,hanw/behavioral-model,hanw/behavioral-model,ops-p4/ops-p4dp,p4lang/behavioral-model,hanw/behavioral-model,ops-p4/ops-p4dp,p4lang/behavioral-model,ops-p4/ops-p4dp,p4lang/behavioral-model,hanw/behavioral-model