Fix bad metatable creation.

diff --git a/classes/Battle.lua b/classes/Battle.lua
index 13e29bd..5ff580b 100644
--- a/classes/Battle.lua
+++ b/classes/Battle.lua
@@ -13,6 +13,7 @@ local function n0(val) if val == nil then return 0 end return val end

 -- Setup class
 CyrHUD.Battle = {}
+CyrHUD.Battle.__index = CyrHUD.Battle
 -- This file is part of CyrHUD
 --
 -- (C) 2014 Scott Yeskie (Sasky)