Fixed a bug in the subscript operation.

--HG--
branch : trunk
diff --git a/CHANGES b/CHANGES
index c1eb733..eb730f1 100644
--- a/CHANGES
+++ b/CHANGES
@@ -14,6 +14,10 @@
 
 - fixed a limitation in the lexer that made ``{{ foo.0.0 }}`` impossible.
 
+- index based subscribing of variables with a constant value returns an
+  undefined object now instead of raising an index error.  This was a bug
+  caused by eager optimizing.
+
 Version 2.0
 -----------
 (codename jinjavitus, released on July 17th 2008)