karma init throwing error on Windows

### Expected behavior

We should expect to get some sort of init just like karma-cli...which is also broke on Windows
### Actual behavior

`$ karma init

> readline.js:526
> this.line = this.line.slice(this.cursor);
> ^

TypeError: Cannot read property 'slice' of undefined
at Interface._deleteLineLeft (readline.js:526:24)
at suggestNextOption (C:\dev\R22788\web-app\web\node_modules\karma\lib\init\state_machine.js:43:9)
at nextQuestion (C:\dev\R22788\web-app\web\node_modules\karma\lib\init\state_machine.js:119:12)
at process (C:\dev\R22788\web-app\web\node_modules\karma\lib\init\state_machine.js:135:10)
at Object.exports.init (C:\dev\R22788\web-app\web\node_modules\karma\lib\init.js:247:6)
at Object.exports.run (C:\dev\R22788\web-app\web\node_modules\karma\lib\cli.js:249:25)
at requireCliAndRun (C:\Users\ufen\AppData\Roaming\npm\node_modules\karma-cli\bin\karma:44:16)
at C:\Users\ufen\AppData\Roaming\npm\node_modules\karma-cli\bin\karma:54:12
at C:\Users\ufen\AppData\Roaming\npm\node_modules\karma-cli\node_modules\resolve\lib\async.js:44:21
at ondir (C:\Users\ufen\AppData\Roaming\npm\node_modules\karma-cli\node_modules\resolve\lib\async.js:187:31)
at C:\Users\ufen\AppData\Roaming\npm\node_modules\karma-cli\node_modules\resolve\lib\async.js:153:39
at onex (C:\Users\ufen\AppData\Roaming\npm\node_modules\karma-cli\node_modules\resolve\lib\async.js:93:22)
at C:\Users\ufen\AppData\Roaming\npm\node_modules\karma-cli\node_modules\resolve\lib\async.js:24:18
at FSReqWrap.oncomplete (fs.js:82:15)
`
### Enviroment Details
- Windows 7 Enterprise
- node version 5.9
- Karma version (output of `karma --version`): 0.13.22
### Steps to reproduce the behaviour
1. run karma init from node_modules