(SIOCGIFCONF): Bad file descriptor

``` javascript
var IFEdriver = require('ife'),
    ife = new IFEdriver();
var ifaces = ife.list()

console.log(ifaces)
```

results in

```
╭─{ } kumavis in ~/Development/Node/mrsysadmin on (master✱)
╰─○ node test.js
ioctl (SIOCGIFCONF): Bad file descriptor
[]
```
