K 10
svn:author
V 6
obrien
K 8
svn:date
V 27
2002-04-13T10:13:39.000000Z
K 7
svn:log
V 163
Make str_concat handle NULL arguments properly (a-la how ODE-2.3.6 make does).

Submitted by:	jmallett
Inspired by:	CMU BUILDTOOLS4 coredumping, ODE-2.3.6 make(1)

END