Add DeviceHandle::into_raw()

[elmarco]

As exotic as it may be, libusbredir requires to give the device handle
ownership to the library. This function helps to achieve this, without
having to leak the a DeviceHandle with mem::forget.

[a1ien]

Looks good. But I need a little time to think it over.

[elmarco]

We may want to make the function explicitely unsafe?

[elmarco]

Following Rust idioms,I don't think the function should be unsafe.

@a1ien what do you think? thanks

[a1ien]

I don't like just one thing it's unwrap calls as_raw and into_raw.
I think match and unreachable!() wold better

[elmarco]

I don't like just one thing it's unwrap calls as_raw and into_raw.
I think match and unreachable!() wold better

ok, but why?

[a1ien]

ok, but why?

unwrap looks like not finished code. Like "example". But match and unreachable it's mean you absolutely do not expect that this path will be executed

[a1ien]

LGTM. Thanks!