Signup without enough balance - uncaught exceptopn

[jerkyrs]

Uncaught exception when attempting to create an account without enough balance

To create

iwallet account create test9999 --account nobalanceaccount

Stacktrace

    "message": "running action Action{Contract: auth.iost, ActionName: signUp, Data: [\"test99999\", \"9pRGe2VHTYyLNBtVqhenTX9MoUZJ7FELc... error: Uncaught exception: Error: balance not enough 0 \u003c 10\nat blockchain.js:66:33\n              return JSON.parse(bc.callWithAuth(contract, api, args));\n                                   ^\nStack tree: \nError: balance not enough 0 \u003c 10\n    at Object.callWithAuth (blockchain.js:66:34)\n    at Account.signUp (_default_name.js:131:60)\n    at _default_name.js:352:14",
    "returns": [
    ],
    "receipts": [
    ]
}

This should be handled gracefully