Fix off by one error in PAM env patch

Tidy changelog
diff --git a/ChangeLog b/ChangeLog
index 04a5f7d..02eeb8a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -9,6 +9,8 @@
  - Removed redundant subdirectories
  - Integrated part of a patch from Dan Brosemer <odin@linuxfreak.com> for 
    building on Debian.
+ - Fixed off-by-one error in PAM env patch
+ - Released 1.2pre6
 
 19991028
  - Further PAM enhancements.