Bug#183541: cdebconf/slang: wrong display range with long lists

[Petter Reinholdtsen <pere@hungry.com>]

Package: cdebconf-slang-udeb
Version: 0.31
Severity: important

I'm using the slang frontend.  When the main menu contains a lot of
options, some options are not displayed, and one need to scroll to
reach the other options.  When the menu first appear, the upper part
of the list is always displayed, no matter which option is currently
the default.

The result is a menu with apparently no 'checked' option, and no bar
indicating where on the menu the focus is.  One must use the arrow
keys to move the cursor up or down to get it displayed.

I believe the cursor and the current default should always be
displayed when the menu first appear.  The current behaviour is very
confusing.