Describe the bug
Getnep5balances, balance won't change when a tx is not transfer. Then, make a transfer tx, the gas balance value will return to normal.

To Reproduce
1.open wallet 6.json, deploy a smartcontract, list asset, gas balance = 8.9850761

2.rpc getnep5balances, gas balance didn't change, gas balance = 10

3.make a transfer transaction, list asset, gas balance = 6.9723922

4.rpc getnep5balances, gas balance changed, gas balance = 6.9723922