fix num to amount in types for asset rpcs
fix num to amount in types for asset rpcs


Former-commit-id: 43a6da23c4d193603246c8dfc91c161b255c6a8c
syscoin/syscoin,syscoin/syscoin2,syscoin/syscoin,syscoin/syscoin2,syscoin/syscoin,syscoin/syscoin2,syscoin/syscoin2,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin2,syscoin/syscoin2,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin