hal-disable-polling aborts with a traceback.

Issue

Running hal-disable-polling --device /dev/cdrom aborts with the following traceback message:

$ sudo hal-disable-polling --device /dev/cdrom
*** buffer overflow detected ***: hal-disable-polling terminated
======= Backtrace: =========
/lib64/libc.so.6(__fortify_fail+0x37)[0x7f74c3cfb687]
/lib64/libc.so.6(+0xf56a0)[0x7f74c3cf96a0]
/lib64/libc.so.6(+0xf5cfb)[0x7f74c3cf9cfb]
hal-disable-polling[0x40148b]
/lib64/libc.so.6(__libc_start_main+0xfd)[0x7f74c3c22b1d]
hal-disable-polling[0x400e49]
...
Aborted (core dumped)