[gcalctool] add NEWS entry for error message UI location

[Robert Ancell <rancell src gnome org>]

commit dfa9329c0716eb033d2b37ca9feceac098af8674
Author: Robert Ancell <robert ancell gmail com>
Date:   Mon Sep 28 13:30:20 2009 +1000

    add NEWS entry for error message UI location

 NEWS |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/NEWS b/NEWS
index 3f9a73f..46fecc7 100644
--- a/NEWS
+++ b/NEWS
@@ -11,6 +11,7 @@ Overview of changes in gcalctool 5.29.0
       - Superscript and subscript numbers to allow better notation, e.g. "â??â??5"
       - Preferences moved into a dialog
       - Functions are now typed, e.g. s+i+n for sine instead of "k"
+      - Error messages now displayed below equation, and improved descriptions
 
 Overview of changes in gcalctool 5.28.0