bin/108368 patch

[Divacky Roman]

The following reply was made to PR bin/108368; it has been noted by GNATS.

From: Divacky Roman <xdivac02 at stud.fit.vutbr.cz>
To: FreeBSD-gnats-submit at freebsd.org
Cc:  
Subject: bin/108368 patch
Date: Wed, 14 Mar 2007 19:02:27 +0100

 here's a patch that fixes the coredump
 
 Index: acu.c
 ===================================================================
 RCS file: /home/ncvs/src/usr.bin/tip/tip/acu.c,v
 retrieving revision 1.8
 diff -u -r1.8 acu.c
 --- acu.c	31 Aug 2006 14:14:29 -0000	1.8
 +++ acu.c	7 Mar 2007 16:33:04 -0000
 @@ -100,10 +100,10 @@
  	if ((acu = acutype(AT)) == NOACU)
  		return ("unknown ACU type");
  	if (*cp != '@') {
 -		while (*cp) {
 +		while (cp != NULL && *cp) {
  			phnum = cp;
  			cp = strpbrk(cp, ",");
 -			if (*cp != '\0')
 +			if (cp != NULL && *cp != '\0')
  				*cp++ = '\0';
  
  			if (strlen(phnum) == 0)