Fix MfError::Errno for macos targets

[alanbaumgartner]

Not much to add here, macos uses libc::__error() rather than libc::__errno_location() on linux.

[ItsEthra]

You have updated windows crate version but I'm not sure if it will build, I will need to test it on my windows machine.

[alanbaumgartner]

You have updated windows crate version but I'm not sure if it will build, I will need to test it on my windows machine.

Good point 👍, I believe theres a few more updates I need to make (other than the few I just pushed up). I can make those updates after work today. Either that or downgrading the version.

Thanks for the quick reply too :)