From 48535752695deb8f0effb44688592c2c33457cc0 Mon Sep 17 00:00:00 2001
From: Scott Owens <sowens@cs.utah.edu>
Date: Mon, 29 Nov 2004 19:27:27 +0000
Subject: [PATCH] *** empty log message ***

original commit: d2c6b4f2dd1e0fb1670a195ca6d10dad42e9336b
---
 collects/framework/private/color.ss | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/collects/framework/private/color.ss b/collects/framework/private/color.ss
index bd817568..25818723 100644
--- a/collects/framework/private/color.ss
+++ b/collects/framework/private/color.ss
@@ -266,9 +266,10 @@
               (semaphore-wait mutex-lock)
               (thread-suspend background-thread)
               (semaphore-post mutex-lock)
-              (begin-edit-sequence #f #f)
-              (color)
-              (end-edit-sequence)))
+              (unless (null? colors)
+                (begin-edit-sequence #f #f)
+                (color)
+                (end-edit-sequence))))
           
           (define/private (colorer-callback)
             (cond