isl_convex_hull.c: uset_convex_hull_wrap_bounded: fix error handling

diff --git a/isl_convex_hull.c b/isl_convex_hull.c
index 1fd8143..f8565e0 100644 (file)
--- a/isl_convex_hull.c
+++ b/isl_convex_hull.c
@@ -1808,6 +1808,9 @@ static struct isl_basic_set *uset_convex_hull_wrap_bounded(struct isl_set *set)
 {
        struct isl_basic_set *convex_hull = NULL;
 
+       if (!set)
+               goto error;
+
        if (isl_set_n_dim(set) == 0) {
                convex_hull = isl_basic_set_universe(isl_dim_copy(set->dim));
                isl_set_free(set);
@@ -1816,9 +1819,6 @@ static struct isl_basic_set *uset_convex_hull_wrap_bounded(struct isl_set *set)
        }
 
        set = isl_set_set_rational(set);
-
-       if (!set)
-               goto error;
        set = isl_set_coalesce(set);
        if (!set)
                goto error;