The original g_udev_device_get_property_as_int() uses strtol() without
an explicit base (i.e. 0) so that the base is autodetected from the
string whenever possible (e.g. if prefixes with '0x' it is treated as a
hexadecimal string).
But, for ID_USB_INTERFACE_NUM, we explicitly require reading the number
as an hex string, even if we don't have any '0x' prefix.
Reported-by: Matthew Stanger <stangerm2@gmail.com>
820ab01ddf