From ac2143d72da8f1e1f35d0870d8ef8b0cd16bda7b Mon Sep 17 00:00:00 2001
From: Sven Verdoolaege <skimo@kotnet.org>
Date: Sun, 2 Dec 2012 16:56:50 +0100
Subject: [PATCH] isl_mat_transpose: handle NULL input

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>
---
 isl_mat.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/isl_mat.c b/isl_mat.c
index 6cd90e0..cff8123 100644
--- a/isl_mat.c
+++ b/isl_mat.c
@@ -909,6 +909,9 @@ struct isl_mat *isl_mat_transpose(struct isl_mat *mat)
 	struct isl_mat *transpose = NULL;
 	int i, j;
 
+	if (!mat)
+		return NULL;
+
 	if (mat->n_col == mat->n_row) {
 		mat = isl_mat_cow(mat);
 		if (!mat)
-- 
2.7.4