macOS: send report id conditionally for hid_get_feature_report

[Youw]

same as in hid_send_feature_report, and Windows/Linux

[Youw]

This will likely reference #60.

@DanielVanNoord, @micolous, please try if this works with your device(s).
It does with mine.

[Youw]

@DanielVanNoord, @micolous ping

hidapi team, your opinion/feedback is needed
with all my local tests, this implementation looks best and consistent with other systems

@z3ntu, you have originally propagated #3, so you feedback is appreciated too

[z3ntu]

Apparently the devices I use hidapi with, don't use numbered reports. I'll test this PR tomorrow if it works with my application!

[Youw]

Thanks.
The device I use, does use numbered reports, and #3 did broke my app (as I mentioned earlier, I didn't notice that, since I have my own fork with my own patches).

If this works for you, I think we will accept it this was.

[z3ntu]

Works fine for my use case 👍

[Youw]

@Qbicz, if you don't have comments regarding the implementation, I'd like to merge this ASAP

[DanielVanNoord]

@Youw I'll grab a Mac and test it with my devices that use report ids today. Will let you know the results as soon as I can.

[Qbicz]

@Youw it looks good to me. I don't have a Mac setup so I didn't notice the problem before.

Let's wait for @DanielVanNoord test result.

[Youw]

meanwhile found bug in my own implementation
nothing conceptually changes though

[DanielVanNoord]

Ran some quick tests on a Mac with a device that uses feature report ids and everything seems to be working.

[Youw]

great, we have a winner here