util: update: create a new table if destination is nil

1 files changed, 2 insertions, 3 deletions

diff --git a/server.lua b/server.lua
index 0d28200..c80c766 100644
--- a/server.lua
+++ b/server.lua
@@ -1,5 +1,5 @@
 --[[
-Copyright (c) 2012-2014 Kaarle Ritvanen
+Copyright (c) 2012-2015 Kaarle Ritvanen
 See LICENSE file for license details
 --]]
 
@@ -24,8 +24,7 @@ local sessions = {}
 
 return function(env)
    local function wrap(code, headers, res, encode)
-      if not headers then headers = {} end
-      update(
+      headers = update(
 	 headers,
 	 {
 	    ['Cache-Control']='no-cache, no-store, must-revalidate',