From 14696117cb2b12a498eb19f77c7a60ade72d062e Mon Sep 17 00:00:00 2001
From: Alex Smith <ais523@bham.ac.uk>
Date: Wed, 1 Sep 2010 21:05:00 +0100
Subject: [PATCH] Don't crash on an invalid guessdir

---
 src/uncommon.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/uncommon.c b/src/uncommon.c
index 946924e..692191a 100644
--- a/src/uncommon.c
+++ b/src/uncommon.c
@@ -54,7 +54,7 @@ int ick_printfopens=0;
   /*@observer@*/ static const char *fileiter;
   size_t i = 0, j;
   FILE* ret;
-  while(*guessdir != '\0' && i<BUFSIZ-2) buf2[i++] = *guessdir++;
+  while(guessdir && *guessdir != '\0' && i<BUFSIZ-2) buf2[i++] = *guessdir++;
   buf2[i++] = '/';
   fileiter = file;
   while(*fileiter != '\0' && i<BUFSIZ-1) buf2[i++] = *fileiter++;
@@ -107,7 +107,7 @@ int ick_printfopens=0;
   /*@observer@*/ static const char *fileiter;
   size_t i = 0, j;
   FILE* ret;
-  while(*guessdir != '\0' && i<BUFSIZ-2) buf2[i++] = *guessdir++;
+  while(guessdir && *guessdir != '\0' && i<BUFSIZ-2) buf2[i++] = *guessdir++;
   buf2[i++] = '/';
   fileiter = file;
   while(*fileiter != '\0' && i<BUFSIZ-1) buf2[i++] = *fileiter++;
-- 
2.43.0