hid_close will close immediately on win32

see signal11/hidapi#416

In multi-thread environment, if the hid_read thread is different from the hid_close thread, the hid_read function will block the thread exiting, at the wait object operation.

This fix just set the event, after cancel io, so that, hid_read not wait anymore and exiting read

Author: LianYangCn

windows/hid.c

@@ -823,6 +823,7 @@ void HID_API_EXPORT HID_API_CALL hid_close(hid_device *dev)
 	if (!dev)
 		return;
 	CancelIo(dev->device_handle);
+	SetEvent(dev->ol.hEvent);
 	free_hid_device(dev);
 }