X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=isl_mat.c;h=16a79f755a23e51b4dac4e37a69041108d2a994c;hb=27b230c534bdef3411e89011354b8606514f8614;hp=a4b6e5a2406128724f66f3ff67bff6353e17eb32;hpb=64736c6f748bace12e7f6f152eb7b1fa09b83703;p=platform%2Fupstream%2Fisl.git

diff --git a/isl_mat.c b/isl_mat.c
index a4b6e5a..16a79f7 100644
--- a/isl_mat.c
+++ b/isl_mat.c
@@ -1,7 +1,7 @@
 /*
  * Copyright 2008-2009 Katholieke Universiteit Leuven
  *
- * Use of this software is governed by the GNU LGPLv2.1 license
+ * Use of this software is governed by the MIT license
  *
  * Written by Sven Verdoolaege, K.U.Leuven, Departement
  * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
@@ -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)
@@ -1242,6 +1245,9 @@ struct isl_mat *isl_mat_drop_cols(struct isl_mat *mat, unsigned col, unsigned n)
 {
 	int r;
 
+	if (n == 0)
+		return mat;
+
 	mat = isl_mat_cow(mat);
 	if (!mat)
 		return NULL;