int opendev2(int device_index, struct sr_device_instance **sdi,
libusb_device *dev, struct libusb_device_descriptor *des,
int *skip, uint16_t vid, uint16_t pid, int interface)
int opendev2(int device_index, struct sr_device_instance **sdi,
libusb_device *dev, struct libusb_device_descriptor *des,
int *skip, uint16_t vid, uint16_t pid, int interface)