Add note that last commits fixes #298.

Author: wichert

changes.md

@@ -2,6 +2,10 @@
 
 ## 1.2.1 - Unreleased
 
+- Fix use of an undeclared variable in the parser could result in problems
+  in IE8. This fixes
+  [Ticket 298](https://github.com/Patternslib/Patterns/issues/298).
+
 - Fix handling of trailing semicolons in the the argument parser. This fixes
   [Ticket 295](https://github.com/Patternslib/Patterns/issues/295).