bin/42412: atc(6) segfaults on invalid $TERM

[dholland%eecs.harvard.edu@localhost]

>Number:         42412
>Category:       bin
>Synopsis:       atc(6) segfaults on invalid $TERM
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Dec 04 21:50:03 +0000 2009
>Originator:     David A. Holland
>Release:        NetBSD 5.99.15 (~20090831)
>Organization:
>Environment:
System: NetBSD tanaqui 5.99.15 NetBSD 5.99.15 (TANAQUI) #29: Thu Sep 3 18:23:41 
EDT 2009 dholland@tanaqui:/usr/src/sys/arch/i386/compile/TANAQUI i386
Architecture: i386
Machine: i386
>Description:

% env TERM=fubar /usr/games/atc
Segmentation fault
% 

>How-To-Repeat:

as above

>Fix:

probably trivial
(this PR is so I don't forget)