Error: Input key is empty

[SN4T14]

If .hash() is fed an empty string, it throws this error:

{ [Error: Input key is empty] propertyValue: <Buffer > }

Code to reproduce the issue:

var scrypt = require('scrypt-for-humans');
var Promise = require('bluebird');

Promise.try(function(){
    return scrypt.hash("");
}).then(function(hash){
    console.log(hash);
}).catch(function (err) {
    console.log(err);
});

It should instead throw an error of type scrypt.InputError.

[SN4T14]

To add to this, if you give .verify() an empty string, it throws this error:

{ err_code: 2, err_message: 'Module addon argument error: key cannot be empty' }