Bug#706679: Missing Depends: file

["Trent W. Buck" <trentbuck@gmail.com>]

Package: live-config
Version: 3.0.23-1
Severity: minor

During reboot of a minimal live image, I get

    live-boot: caching reboot files...
    /lib/live/boot-init.sh: 38: /lib/live/boot-init.sh: file: not found
    /lib/live/boot-init.sh: 38: /lib/live/boot-init.sh: file: not found
    /lib/live/boot-init.sh: 38: /lib/live/boot-init.sh: file: not found
    expr: syntax error


    Please remove the disc, close the tray (if any) and press ENTER to continue:

This is because file is not installed.

AFAICT, there are no hard depends anywhere in live-config's dependency
chain, so it should either add one or check for file's presence before
using it.