$OpenBSD: patch-libusb_os_openbsd_usb_c,v 1.7 2018/07/19 12:36:34 mpi Exp $

Export port number, fix github #314.

Index: libusb/os/openbsd_usb.c
--- libusb/os/openbsd_usb.c.orig
+++ libusb/os/openbsd_usb.c
@@ -201,6 +201,7 @@ obsd_get_device_list(struct libusb_context * ctx,
 				dev->bus_number = di.udi_bus;
 				dev->device_address = di.udi_addr;
 				dev->speed = di.udi_speed;
+				dev->port_number = di.udi_port;
 
 				dpriv = (struct device_priv *)dev->os_priv;
 				dpriv->fd = -1;
