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one-true-awk: Avoid a NULL dereference.

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CID:		270862
Obtained from:	NetBSD (CVS Rev. 1.8)
MFC after:	2 weeks
This commit is contained in:
Pedro F. Giffuni 2016-06-08 19:24:48 +00:00
parent cadd473c52
commit 17ce5a9b90
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=301689
1 changed files with 1 additions and 1 deletions
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contrib/one-true-awk/tran.c
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@ -333,7 +333,7 @@ char *setsval(Cell *vp, const char *s) /* set string val of a Cell */
donefld = 0; /* mark $1... invalid */
donerec = 1;
}
t = tostring(s); /* in case it's self-assign */
t = s ? tostring(s) : tostring(""); /* in case it's self-assign */
if (freeable(vp))
xfree(vp->sval);
vp->tval &= ~NUM;