From faa0c989f83725745f255840bfcfe28b9f88db95 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C5=99emysl=20Janouch?= <p.janouch@gmail.com>
Date: Sat, 9 Jan 2016 05:05:46 +0100
Subject: [PATCH] degesch: Lua: actually allow filtering out input

---
 degesch.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/degesch.c b/degesch.c
index 5621f96..e42f015 100644
--- a/degesch.c
+++ b/degesch.c
@@ -7649,7 +7649,11 @@ lua_plugin_handle_string_filter_result (struct lua_plugin *self,
 {
 	lua_State *L = self->L;
 	if (lua_isnil (L, -1))
+	{
+		free (*original);
+		*original = NULL;
 		return true;
+	}
 	if (!lua_isstring (L, -1))
 		FAIL ("must return either a string or nil");