isl_mat_extend: avoid memory leak when realloc fails

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>

diff --git a/isl_mat.c b/isl_mat.c
index cb7db6b..271c649 100644 (file)
--- a/isl_mat.c
+++ b/isl_mat.c
@@ -55,6 +55,7 @@ struct isl_mat *isl_mat_extend(struct isl_mat *mat,
 {
        int i;
        isl_int *old;
+       isl_int **row;
 
        if (!mat)
                return NULL;
@@ -87,9 +88,10 @@ struct isl_mat *isl_mat_extend(struct isl_mat *mat,
        mat->block = isl_blk_extend(mat->ctx, mat->block, n_row * mat->max_col);
        if (isl_blk_is_error(mat->block))
                goto error;
-       mat->row = isl_realloc_array(mat->ctx, mat->row, isl_int *, n_row);
-       if (!mat->row)
+       row = isl_realloc_array(mat->ctx, mat->row, isl_int *, n_row);
+       if (!row)
                goto error;
+       mat->row = row;
 
        for (i = 0; i < mat->n_row; ++i)
                mat->row[i] = mat->block.data + (mat->row[i] - old);