gnome-autoar regression

USN-4733-1 fixed a vulnerability in GNOME Autoar. The upstream fix
introduced a regression when extracting archives containing directories.
This update fixes the problem.

Original advisory details:

Yiğit Can Yılmaz discovered that GNOME Autoar could extract files outside
of the intended directory. If a user were tricked into extracting a
specially crafted archive, a remote attacker could create files in
arbitrary locations, possibly leading to code execution.