error on unplugging PS3Eye while makerscanner is running

[robinpaulson]

If I unplug the camera while makerscanner is running, it hugely slows down the computer and repeatedly prints "VIDIOC_DQBUF: No such device" to STDERR. I guess it's looking for a camera which is no longer there.

The obvious workaround/short-term answer is "don't unplug the camera while makerscanner is running", but it would be good to catch this error and for makerscanner to act gracefully.

Cheers