--version and --help commands should return 0 status code

[gabceb]

if --version and --help command execute successfully they should return 0 instead of 255. I checked some of the most commonly used command line tools (git, grep, vim, etc) and they all return 0 on --version and --help.

I ran into this issue when using unoconv --version to check if unoconv was installed properly.

I can provide a PR unless someone disagrees with this.

[dagwieers]

You are correct, a PR would be appreciated.

[gabceb]

Thanks @dagwieers. Sorry that I missed your previous comment

[dagwieers]

No problem. I try to engage people to look at the code, especially for trivial matters :-)
I don't know why it wasn't returning 0 from the very start though...