From 33821f9d1f49922982fe9acefabad1c82956ce6a Mon Sep 17 00:00:00 2001
From: Sven Verdoolaege <skimo@kotnet.org>
Date: Fri, 5 Jul 2013 18:26:31 +0200
Subject: [PATCH] isl_mat_sub_alloc6: accept NULL pointer on zero-size
 allocation

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>
---
 isl_mat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/isl_mat.c b/isl_mat.c
index 616eb617..292264ce 100644
--- a/isl_mat.c
+++ b/isl_mat.c
@@ -123,7 +123,7 @@ __isl_give isl_mat *isl_mat_sub_alloc6(isl_ctx *ctx, isl_int **row,
 	if (!mat)
 		return NULL;
 	mat->row = isl_alloc_array(ctx, isl_int *, n_row);
-	if (!mat->row)
+	if (n_row && !mat->row)
 		goto error;
 	for (i = 0; i < n_row; ++i)
 		mat->row[i] = row[first_row+i] + first_col;
-- 
2.11.4.GIT