[PATCH iproute2-next] tc: Fix compilation error with old iptables

[Roi Dayan]

The compat_rev field does not exists in old versions of iptables.
e.g. iptables 1.4.

Fixes: dd29621578d2 ("tc: add em_ipt ematch for calling xtables matches from tc 
matching context")
Signed-off-by: Roi Dayan <r...@mellanox.com>
---
 tc/em_ipt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tc/em_ipt.c b/tc/em_ipt.c
index 9d2b2f9b46d4..aa2edd63c550 100644
--- a/tc/em_ipt.c
+++ b/tc/em_ipt.c
@@ -41,7 +41,9 @@ static struct xtables_globals em_tc_ipt_globals = {
        .program_version = "0.1",
        .orig_opts = original_opts,
        .opts = original_opts,
+#if (XTABLES_VERSION_CODE >= 11)
        .compat_rev = xtables_compatible_revision,
+#endif
 };
 
 static struct xt_entry_match *fake_xt_entry_match(int data_size, void *data)
-- 
2.7.0