Initialize the non-control endpoint fds in netbsd_open()

Not all users of libusb use libusb_claim_interface(), and in that
case, the NetBSD backend fails to open() the necessary /dev/ugenX.Y
and will try to send ioctl()s to fd 0, which fortunately fails.

This unbreaks e.g. openocd on NetBSD.

Closes #539

Signed-off-by: Nathan Hjelm <hjelmn@me.com>

libusb/os/netbsd_usb.c

diff --git a/libusb/os/netbsd_usb.c b/libusb/os/netbsd_usb.c
index d9c059a..79aeca9 100644
--- a/libusb/os/netbsd_usb.c
+++ b/libusb/os/netbsd_usb.c
@@ -215,6 +215,8 @@
 netbsd_open(struct libusb_device_handle *handle)
 {
 	struct device_priv *dpriv = (struct device_priv *)handle->dev->os_priv;
+	struct handle_priv *hpriv = (struct handle_priv *)handle->os_priv;
+	int i;
 
 	dpriv->fd = open(dpriv->devnode, O_RDWR);
 	if (dpriv->fd < 0) {
@@ -223,6 +225,9 @@
 			return _errno_to_libusb(errno);
 	}
 
+	for (i = 0; i < USB_MAX_ENDPOINTS; i++)
+		hpriv->endpoints[i] = -1;
+
 	usbi_dbg("open %s: fd %d", dpriv->devnode, dpriv->fd);
 
 	return (LIBUSB_SUCCESS);

libusb/version_nano.h

diff --git a/libusb/version_nano.h b/libusb/version_nano.h
index dc15091..0d6bc45 100644
--- a/libusb/version_nano.h
+++ b/libusb/version_nano.h
@@ -1 +1 @@
-#define LIBUSB_NANO 11348
+#define LIBUSB_NANO 11349