Fix sparse warnings: non-ANSI function declarations, 0 used as pointer
diff --git a/extensions/libxt_sctp.c b/extensions/libxt_sctp.c
index 39553bf..c816b99 100644
--- a/extensions/libxt_sctp.c
+++ b/extensions/libxt_sctp.c
@@ -69,12 +69,12 @@
 }
 
 static const struct option opts[] = {
-	{ .name = "source-port", .has_arg = 1, .flag = 0, .val = '1' },
-	{ .name = "sport", .has_arg = 1, .flag = 0, .val = '1' },
-	{ .name = "destination-port", .has_arg = 1, .flag = 0, .val = '2' },
-	{ .name = "dport", .has_arg = 1, .flag = 0, .val = '2' },
-	{ .name = "chunk-types", .has_arg = 1, .flag = 0, .val = '3' },
-	{ .name = 0 }
+	{ .name = "source-port", .has_arg = 1, .val = '1' },
+	{ .name = "sport", .has_arg = 1, .val = '1' },
+	{ .name = "destination-port", .has_arg = 1, .val = '2' },
+	{ .name = "dport", .has_arg = 1, .val = '2' },
+	{ .name = "chunk-types", .has_arg = 1, .val = '3' },
+	{ }
 };
 
 static void