ignoring return Status from drivers\usb\usbstor\scsi.c:USBSTOR_HandleExecuteSCSI()

Calls to USBSTOR_HandleExecuteSCSI() in
drivers\usb\usbstor\queue.c:USBSTOR_StartIo()
drivers\usb\usbstor\error.c:USBSTOR_HandleTransferError()

do not check and handle return status from calls they make to USBSTOR_HandleExecuteSCSI().

(It appears likely in both cases that an IRP should be completed on errors.)