D:2003/09/24 14:12:50
C:USB generic driver
A:Takashi Iwai <tiwai@suse.de>
F:usb/usbaudio.c:1.64->1.65 
F:usb/usbmixer.c:1.22->1.23 
L:- don't create controls from selector units with a single content.
L:- suppress the error if async-out or adaptive-in has only one EP.
L:  don't create a sync pipe in this case.