getAccountPrimeDebtBalance() always return 0
Spelling errors that result in `getAccountPrimeDebtBalance()` Always return 0\\n`getAccountPrimeDebtBalance()` use for Show current debt\\n```\\n    function getAccountPrimeDebtBalance(uint16 currencyId, address account) external view override returns (\\n        int256 debtBalance\\n    ) {\\n        mapping(address => mapping(uint256 => BalanceStorage)) storage store = LibStorage.getBalanceStorage();\\n        BalanceStorage storage balanceStorage = store[account][currencyId];\\n        int256 cashBalance = balanceStorage.cashBalance;\\n\\n        // Only return cash balances less than zero\\n        debtBalance = cashBalance < 0 ? debtBalance : 0;   //<------@audit wrong, Always return 0\\n    }\\n```\\n\\nIn the above code we can see that due to a spelling error, `debtBalance` always ==0 should use `debtBalance = cashBalance < 0 ? cashBalance : 0;`
```\\n    function getAccountPrimeDebtBalance(uint16 currencyId, address account) external view override returns (\\n        int256 debtBalance\\n    ) {\\n        mapping(address => mapping(uint256 => BalanceStorage)) storage store = LibStorage.getBalanceStorage();\\n        BalanceStorage storage balanceStorage = store[account][currencyId];\\n        int256 cashBalance = balanceStorage.cashBalance;\\n\\n        // Only return cash balances less than zero\\n-       debtBalance = cashBalance < 0 ? debtBalance : 0;\\n+       debtBalance = cashBalance < 0 ? cashBalance : 0;\\n    }\\n```\\n
`getAccountPrimeDebtBalance()` is the external method to check the debt If a third party integrates with notional protocol, this method will be used to determine whether the user has debt or not and handle it accordingly, which may lead to serious errors in the third party's business
```\\n    function getAccountPrimeDebtBalance(uint16 currencyId, address account) external view override returns (\\n        int256 debtBalance\\n    ) {\\n        mapping(address => mapping(uint256 => BalanceStorage)) storage store = LibStorage.getBalanceStorage();\\n        BalanceStorage storage balanceStorage = store[account][currencyId];\\n        int256 cashBalance = balanceStorage.cashBalance;\\n\\n        // Only return cash balances less than zero\\n        debtBalance = cashBalance < 0 ? debtBalance : 0;   //<------@audit wrong, Always return 0\\n    }\\n```\\n