If the set is empty, don't send an empty NFTA_SET_ELEM_LIST_ELEMENTS
netlink attributes with no elements.

Signed-off-by: Pablo Neira Ayuso <pa...@netfilter.org>
---
 src/set_elem.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/set_elem.c b/src/set_elem.c
index 46fb7c6e424b..4d2b4f6074b7 100644
--- a/src/set_elem.c
+++ b/src/set_elem.c
@@ -304,6 +304,9 @@ void nftnl_set_elems_nlmsg_build_payload(struct nlmsghdr 
*nlh, struct nftnl_set
 
        nftnl_set_elem_nlmsg_build_def(nlh, s);
 
+       if (list_empty(&s->element_list))
+               return;
+
        nest1 = mnl_attr_nest_start(nlh, NFTA_SET_ELEM_LIST_ELEMENTS);
        list_for_each_entry(elem, &s->element_list, head)
                nftnl_set_elem_build(nlh, elem, ++i);
-- 
2.1.4

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