If we have 0 or 1 USB devices of unknown origin, do not use the enhanced usb:x,y port naming to avoid confusing user frontends.
If we have 0 or 1 USB devices of unknown origin, do not use the enhanced usb:x,y
port naming to avoid confusing user frontends.


git-svn-id: 40dd595c6684d839db675001a64203a1457e7319@7282 67ed7778-7388-44ab-90cf-0a291f65f57c

thusoy/libgphoto2,gphoto/libgphoto2,jbreeden/libgphoto2,gphoto/libgphoto2,jbreeden/libgphoto2,msmeissn/libgphoto2,jbreeden/libgphoto2,thusoy/libgphoto2,gphoto/libgphoto2,gphoto/libgphoto2,thusoy/libgphoto2,jbreeden/libgphoto2,msmeissn/libgphoto2,jbreeden/libgphoto2,gphoto/libgphoto2,msmeissn/libgphoto2,msmeissn/libgphoto2,gphoto/libgphoto2,thusoy/libgphoto2,msmeissn/libgphoto2,thusoy/libgphoto2