Ignore unknown arguments in libipt_ULOG (Patrick McHardy <kaber@trash.net>)
diff --git a/extensions/libipt_ULOG.c b/extensions/libipt_ULOG.c
index 81e0aea..f4b7a14 100644
--- a/extensions/libipt_ULOG.c
+++ b/extensions/libipt_ULOG.c
@@ -144,6 +144,8 @@
 #endif
 		*flags |= IPT_LOG_OPT_QTHRESHOLD;
 		break;
+	default:
+		return 0;
 	}
 	return 1;
 }