Merge branch 'maint'

[platform/upstream/isl.git] / isl_mat.c

diff --git a/isl_mat.c b/isl_mat.c
index cff8123..2848e0a 100644 (file)
--- a/isl_mat.c
+++ b/isl_mat.c
@@ -967,7 +967,8 @@ struct isl_mat *isl_mat_swap_rows(struct isl_mat *mat, unsigned i, unsigned j)
        return mat;
 }
 
-struct isl_mat *isl_mat_product(struct isl_mat *left, struct isl_mat *right)
+__isl_give isl_mat *isl_mat_product(__isl_take isl_mat *left,
+       __isl_take isl_mat *right)
 {
        int i, j, k;
        struct isl_mat *prod;
@@ -1245,6 +1246,9 @@ 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;