From 2238e9044bf4d1545b6ce60ebe969a901e19f1a9 Mon Sep 17 00:00:00 2001
From: Sven Verdoolaege <skimo@kotnet.org>
Date: Fri, 25 Jun 2010 17:12:42 +0200
Subject: [PATCH] isl_convex_hull.c: isl_basic_set_add_equality: avoid NULL
 pointer dereference

---
 isl_convex_hull.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/isl_convex_hull.c b/isl_convex_hull.c
index 4a82e6a2..cf3cfbf8 100644
--- a/isl_convex_hull.c
+++ b/isl_convex_hull.c
@@ -213,6 +213,9 @@ static struct isl_basic_set *isl_basic_set_add_equality(
 	int i;
 	unsigned dim;
 
+	if (!bset)
+		return NULL;
+
 	if (ISL_F_ISSET(bset, ISL_BASIC_SET_EMPTY))
 		return bset;
 
-- 
2.11.4.GIT