Choose an error code according to a wrong depth type

[elfring]

A Python script contains the following statements at the moment.

            if not args.depth.isdigit():
                SysMgr.printErr('wrong depth type')
                sys.exit(0)

I suggest to pass an error code to the exit method call according to the previous error message.

[iipeace]

wow!
It's a big job! ;(
But I agree with you.
I'll try to change them!