From 9c4d2c74dc3ef59506ac7ccef004517f4a529306 Mon Sep 17 00:00:00 2001
From: Peter van Dijk <peter.van.dijk@powerdns.com>
Date: Thu, 18 Mar 2021 16:17:19 +0100
Subject: [PATCH] use nullptr

---
 ext/luawrapper/include/LuaContext.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ext/luawrapper/include/LuaContext.hpp b/ext/luawrapper/include/LuaContext.hpp
index 49aed17bbf..e3a87ee9b7 100644
--- a/ext/luawrapper/include/LuaContext.hpp
+++ b/ext/luawrapper/include/LuaContext.hpp
@@ -2690,12 +2690,12 @@ struct LuaContext::Reader<std::string>
         size_t len;
         const auto val = lua_tolstring(state, -1, &len);
 
-        if (val != 0)
+        if (val != nullptr)
           result.assign(val, len);
 
         lua_pop(state, 1);
 
-        return val != 0 ? boost::optional<std::string>{ std::move(result) } : boost::none;
+        return val != nullptr ? boost::optional<std::string>{ std::move(result) } : boost::none;
     }
 };
 
-- 
2.47.2