Unrecognized arguments error when no device is found. #213

[LennardKittner]

Solves #213 by checking if a supported device is found; if not, "E: No supported device found." is printed and the program exits.

I also fixed two typos in cli.py.

[LennardKittner]

Strange on my device, all tests pass.

[LennardKittner]

I fixed the tests by changing the occurrences of sys.argv in main to args.
This fixes the tests because sys.argv is empty in tests and args holds the real arguments.
However, this change also makes sense if we are not running tests because args is the actual function parameter and sys.argv is just the default value.

[flozz]

Hello,

I will have no time to review this before ~ 1 or 2 weeks. I just want to let you know that I am not ignoring your PR :)

[LennardKittner]

Alright, thank you for letting me know :)

[flozz]

Merged, thank you for the PR (and nice catch for the sys.argv... ^^').
It will be released with next rivalcfg version. :)