screen: fix CVE-2025-46804

screen: fix CVE-2025-46804

A minor information leak when running Screen with setuid-root
privileges allosw unprivileged users to deduce information
about a path that would otherwise not be available.

Affected are older Screen versions, as well as version 5.0.0.

Reference:
https://security-tracker.debian.org/tracker/CVE-2025-46804

Upstream-patch:
https://cgit.git.savannah.gnu.org/cgit/screen.git/commit/?id=e0eef5aac453fa98a2664416a56c50ad1d00cb30

Signed-off-by: Divya Chellam <divya.chellam@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>