Bug#183362: lilo-installer: 'cancel' button do not cancel

[Petter Reinholdtsen <pere@hungry.com>]

Package: lilo-installer
Version: 0.0.10

When installing using DEBIAN_FRONTEND=slang and DEBCONF_PRIORITY=high,
only one question appear from lilo-installer, only the question "On
which device should LILO install the boot block" appears.  As part of
this question, two buttons <next> and <cancel>, appear.  Pressing
<next> continues with the lilo installation, but so do <cancel>.  I
expected <cancel> to abort the lilo installation and bring me back to
the menu.

If the <cancel> button appear, it should work.