Add vlclua_dir_list_free to free list created by vlclua_dir_list and use it.

[vlc] / share / skins2 / skin.catalog

<?xml version="1.0"?>
<!DOCTYPE Theme PUBLIC "-//VideoLAN//DTD VLC Skins V2.0//EN" "skin.dtd">
<catalog xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog">
</catalog>