Bug#370487: partitions get formated after unsure confirmation in graphical installer

["Thomas Geyer" <geyerth@googlemail.com>]

Package: debian-installer
 Version: 20060605
 severity: normal

Exact version is the daily build of netinstall-cd for testing from
june 05 th 2006 (graphical installer)

After I did the settings for partitioning,
there was a dialog for confirmation if I want to write changes to disc.

I checked the checkbox "Write changes to disks? [ ]"
but pressed the button "go back" instead of "continue"

After this the installer started to format partitions.

This could be an unexpected behaviour, if somebody wants
to think twice and go back after allready checking the checkbox.

In other cases, like installing grub or erasing a partition, the
installer behaves like expected,
and goes back one step after pressing  "go back", even if the checkbox
is checked.