[Toybox] Junk printed on exit from top

[Rich Felker]

With toybox 0.8.3 on J2 I'm getting some junk printed along with the
final escape sequence when exiting top. strace shows:

writev(1, [{"\0\0\0\1\0\0\0\1\24\307\252\364\24\274!`\24\277\320\220\0\0 \0H\33[K", 28}, {NULL, 0}], 2) = 28

I haven't tracked down the cause. I did look for relevant commits
since then that migth have fixed it but didn't see any so I haven't
retested with latest.

Rich