From 145532167c2346f876ab682a1e04109ecc1df4f3 Mon Sep 17 00:00:00 2001
From: Sven Verdoolaege <skimo@kotnet.org>
Date: Sat, 26 Jun 2010 12:40:27 +0200
Subject: [PATCH] isl_tab_extend_cons: avoid NULL pointer dereference

---
 isl_tab.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/isl_tab.c b/isl_tab.c
index 3b2d90a1..5eafec45 100644
--- a/isl_tab.c
+++ b/isl_tab.c
@@ -87,11 +87,13 @@ error:
 
 int isl_tab_extend_cons(struct isl_tab *tab, unsigned n_new)
 {
-	unsigned off = 2 + tab->M;
+	unsigned off;
 
 	if (!tab)
 		return -1;
 
+	off = 2 + tab->M;
+
 	if (tab->max_con < tab->n_con + n_new) {
 		struct isl_tab_var *con;
 
-- 
2.11.4.GIT