xtables-events: fix compilation due change in libnftables

The patch (989b793 src: unify parse and output types) changed
the table and chain type definitions, adapt this code to use
the new ones.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
diff --git a/iptables/xtables-events.c b/iptables/xtables-events.c
index 20392a5..408e091 100644
--- a/iptables/xtables-events.c
+++ b/iptables/xtables-events.c
@@ -44,7 +44,7 @@
 		goto err_free;
 	}
 
-	nft_table_snprintf(buf, sizeof(buf), t, NFT_TABLE_O_DEFAULT, 0);
+	nft_table_snprintf(buf, sizeof(buf), t, NFT_OUTPUT_DEFAULT, 0);
 	/* FIXME: define syntax to represent table events */
 	printf("# [table: %s]\t%s\n", type == NFT_MSG_NEWTABLE ? "NEW" : "DEL", buf);
 
@@ -112,7 +112,7 @@
 		goto err_free;
 	}
 
-	nft_chain_snprintf(buf, sizeof(buf), t, NFT_CHAIN_O_DEFAULT, 0);
+	nft_chain_snprintf(buf, sizeof(buf), t, NFT_OUTPUT_DEFAULT, 0);
 	/* FIXME: define syntax to represent chain events */
 	printf("# [chain: %s]\t%s\n", type == NFT_MSG_NEWCHAIN ? "NEW" : "DEL", buf);