--- a/util/hmac.lua	Sun Jul 05 20:40:31 2009 +0500
+++ b/util/hmac.lua	Sun Jul 05 17:06:22 2009 +0100
@@ -4,7 +4,7 @@
 module "hmac"
 
 local function arraystr(array)
-    t = {}
+    local t = {}
     for i = 1,table.getn(array) do
         table.insert(t, string.char(array[i]))
     end