curses: fix left/right arrow translation

In default VGA font, left/right arrow are glyphs 0x1a and 0x1b, not 0x0a and
0x0b.

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Message-id: 20161015195308.20473-2-samuel.thibault@ens-lyon.org
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>