Fixed obtain filter for Cataclysm.

diff --git a/Interface/List.lua b/Interface/List.lua
index 67e2feb..413c345 100644
--- a/Interface/List.lua
+++ b/Interface/List.lua
@@ -429,6 +429,7 @@ function private.InitializeListFrame()
 			[V.ORIG]	= "expansion0",
 			[V.TBC]		= "expansion1",
 			[V.WOTLK]	= "expansion2",
+			[V.CATA]	= "expansion3",
 		}

 		local Q = private.item_qualities