dnsdist: Fix a 'auto causes a copy' warning from Coverity (CID 408612)

diff --git a/pdns/dnsdist-lua.cc b/pdns/dnsdist-lua.cc
index 157076025c22fad38bb4a5b63aaac04e137b87a8..958875c7437cf4de81c5f709f65c1f15bbecf860 100644 (file)
--- a/pdns/dnsdist-lua.cc
+++ b/pdns/dnsdist-lua.cc
@@ -1571,7 +1571,7 @@ static void setupLuaConfig(LuaContext& luaCtx, bool client, bool configCheck)
                            clientIPCA = boost::get<ComboAddress>(clientIP);
                          }
                          else {
-                           auto clientIPStr = boost::get<std::string>(clientIP);
+                           const auto& clientIPStr = boost::get<std::string>(clientIP);
                            try {
                              clientIPCA = ComboAddress(clientIPStr);
                            }