isl_basic_map_set_to_empty: add missing assignment

diff --git a/isl_map.c b/isl_map.c
index ad33a66..49a7281 100644 (file)
--- a/isl_map.c
+++ b/isl_map.c
@@ -1135,7 +1135,7 @@ struct isl_basic_map *isl_basic_map_set_to_empty(struct isl_basic_map *bmap)
        if (bmap->n_eq > 0)
                isl_basic_map_free_equality(bmap, bmap->n_eq-1);
        else {
-               isl_basic_map_alloc_equality(bmap);
+               i = isl_basic_map_alloc_equality(bmap);
                if (i < 0)
                        goto error;
        }