Fix libusb20_dev_get_device_desc and defunt xref.
Fix libusb20_dev_get_device_desc and defunt xref.

Submitted by:	Hans Petter Selasky

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase