[Toybox] Ls row segfault

[Denys Nykula]

With 81 character wide terminal, toy ls dislikes my etc dir, my home dir
and most other dirs on my netbook, unless given -1 or -l.

etc=`mktemp -d`; echo $etc; cd $etc
touch ImageMagick-7 Muttrc dbus-1 drirc.d dropbear fontconfig git group \
group- lynx.cfg lynx.lss mailcap mime.types mk.conf openssl passwd \
passwd- profile rc.d resolv.conf rhashrc sasl2 sgml shadow shadow- \
tmux.conf udev wpa_supplicant.conf xml
ls
# Segmentation fault

Ls starts to like the dirs again when I remove some files.

rm udev wpa_supplicant.conf xml
ls
# Okay