netfilter: add dummy members to Ebtables code to ease transition to Xtables

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/net/bridge/netfilter/ebt_snat.c b/net/bridge/netfilter/ebt_snat.c
index d13f05d..0e83de7 100644
--- a/net/bridge/netfilter/ebt_snat.c
+++ b/net/bridge/netfilter/ebt_snat.c
@@ -68,6 +68,8 @@
 
 static struct ebt_target snat __read_mostly = {
 	.name		= EBT_SNAT_TARGET,
+	.revision	= 0,
+	.family		= NFPROTO_BRIDGE,
 	.target		= ebt_target_snat,
 	.check		= ebt_target_snat_check,
 	.targetsize	= XT_ALIGN(sizeof(struct ebt_nat_info)),