u64 args doesn't work

[bestouff]

If I put this in the Cli struct:

    #[structopt(long = "timeout", short = "t", default_value = "3")]
    timeout: u64,

then args.timeout's value is 0 by default, and 1 if I pass a --timeout 5 argument.
If I replace u64 with u32 it works as expected.

[killercup]

This is structopt's behavior, so if you think this is a problem, please open an issue at https://github.com/TeXitoi/structopt :)

I think this is by design, though. https://docs.rs/structopt-derive/0.1.6/structopt_derive/ says u64 maps to "number of times the flag is used".

[bestouff]

Yep, found the corresponding issue: TeXitoi/structopt#30 - apparently it'll be fixed in structopt 0.2

Please make sure to update to 0.2 when it's available.