usbip:usbip_common.c: check return value of sscanf
usbip:usbip_common.c: check return value of sscanf

Added code to check return value of sscanf.

Signed-off-by: John de la Garza <a51dda7c7ff50b61eaea0444371f4a6a9301e501@jjdev.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs