Windows: Fix devices enumeration

[jm4R]

Based on
https://github.com/microsoft/Windows-driver-samples/blob/master/hid/hclient/pnp.c#L32

Fixes wrong detection of the class of devices.

Fixes: #234

[Youw]

what are the chances we will fail to filter out a non-hid devices?
I understand that HID class GUID should do the trick, but still, this implementation been here like forever, and I'like to give it some thinking, just in case.

[jm4R]

what are the chances we will fail to filter out a non-hid devices?
I understand that HID class GUID should do the trick, but still, this implementation been here like forever, and I'like to give it some thinking, just in case.

I am not WinApi expert but because this PR is based on the code straight from Microsoft, I assume it should be correct. I also read the documentation of each changed function and indicated that it should work. If the bug I fixed by this PR was there "forever" too (and I am 100% sure it is a bug), I am confused nobody discovered it yet. But maybe some people did - there are a number of open issues in the old repository, that could be caused by this. For example:
signal11/hidapi#290
signal11/hidapi#221

In my use case the old code didn't work (described in #234), but it is my use case :)