Unrecognized arguments error when no device is found.

[LennardKittner]

Bug description

What happened

Running rivalcfg --battery-level with no supported device connected returns an unrecognized arguments error.

$ rivalcfg --battery-level
usage: rivalcfg [-h] [--list] [--version] [--no-save] [--update-udev] [--print-udev] [--print-debug]
rivalcfg: error: unrecognized arguments: --battery-level

What was expected

I would expect an error message saying that no supported device was found.

Step to reproduce

• Is the bug always reproducible or is it "random"?

→ always reproducible

1. Disconnect all device dongles.
2. Run rivalcfg --battery-level

System information

RIVALCFG
========
Version: 4.9.0
udev rules installed: True
udev rules up to date: True
Installation path: /usr/lib/python3.11/site-packages/rivalcfg

OPERATING SYSTEM
================
OS: Linux
Platform: Linux-5.15.114-2-MANJARO-x86_64-with-glibc2.37
Version: #1 SMP PREEMPT Sun Jun 4 10:32:43 UTC 2023
Distribution issue: Manjaro Linux \r  (\n) (\l)

PYTHON
======
Python version: 3.11.3
HIDAPI version: 0.14.0

PLUGGED STEELSERIES DEVICES ENDPOINTS
=====================================

Resolving the Issue

I have already fixed the issue locally and will submit a pull request soon.

[flozz]

Fixed by #214, it will be released in next rivalcfg version :)