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


Former-commit-id: 6e5521bca42bd3b6b3e30f1e74b7675f04761c3d
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin