Description:

Passing the `-b` command line option to `netbrake` results in a segmentation fault:

`netbrake -b -r 128k pacman -Su`:
```
Segmentation fault
```

`netbrake -b`:
```
Segmentation fault
```

`dmesg` shows for the latter command:

```[147034.319512] netbrake[16228]: segfault at 0 ip 00007f3e800ae9ba sp 00007ffe04f0cde8 error 4 in libc.so.6[7f3e80026000+15f000] likely on CPU 1 (core 1, socket 0)
[147034.319534] Code: f3 0f 1e fa 66 0f ef c0 66 0f ef c9 66 0f ef d2 66 0f ef db 48 89 f8 48 89 f9 48 81 e1 ff 0f 00 00 48 81 f9 cf 0f 00 00 77 66 <f3> 0f 6f 20 66 0f 74 e0 66 0f d7 d4 85 d2 74 04 0f bc c2 c3 48 83
```

`gdb netbrake`, `run -b`:
```
Starting program: /usr/bin/netbrake -b
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7cae9ba in ?? () from /usr/lib/libc.so.6
```
`(gdb) bt`:
```
#0 0x00007ffff7cae9ba in ?? () from /usr/lib/libc.so.6
#1 0x00007ffff7c43b82 in ?? () from /usr/lib/libc.so.6
#2 0x0000555555555223 in ?? ()
#3 0x00007ffff7c27cd0 in ?? () from /usr/lib/libc.so.6
#4 0x00007ffff7c27d8a in __libc_start_main () from /usr/lib/libc.so.6
#5 0x00005555555553fe in ?? ()
```

Additional info:
* package version(s): 0.2-7

Regards!