isl_set_project_out: always update dimension, even for empty sets

diff --git a/isl_map.c b/isl_map.c
index 7746979..3cc76a4 100644 (file)
--- a/isl_map.c
+++ b/isl_map.c
@@ -2024,9 +2024,6 @@ __isl_give isl_set *isl_set_project_out(__isl_take isl_set *set,
        isl_assert(set->ctx, type == isl_dim_set, goto error);
        isl_assert(set->ctx, first + n == isl_set_n_dim(set), goto error);
 
-       if (n == 0)
-               return set;
-
        set = isl_set_cow(set);
        if (!set)
                goto error;