linux_udev: Fix a Coverity warning
This really is a false positive, but easy enough to silence:
*** CID 62578: Failure to restore non-local value (MISSING_RESTORE)
/libusb/os/linux_udev.c: 64 in linux_udev_start_event_monitor()
58 int r;
59
60 assert(udev_ctx == NULL);
61 udev_ctx = udev_new();
62 if (!udev_ctx) {
63 usbi_err(NULL, "could not create udev context");
>>> CID 62578: Failure to restore non-local value (MISSING_RESTORE)
>>> Value of non-local "udev_ctx" that was verified to be "NULL" is not restored as it was along other paths.
64 return LIBUSB_ERROR_OTHER;
65 }
66
67 udev_monitor = udev_monitor_new_from_netlink(udev_ctx, "udev");
68 if (!udev_monitor) {
69 usbi_err(NULL, "could not initialize udev monitor");
Signed-off-by: Hans de Goede <hdegoede@redhat.com>