From 50b3d5320e378b855eaf4eaf43d139b50f7ab86c Mon Sep 17 00:00:00 2001
From: "Edward Z. Yang" <edwardzyang@thewritingpot.com>
Date: Fri, 4 Aug 2006 03:01:45 +0000
Subject: [PATCH] Correct slight hole involving AttrDefs that don't have a
 return value.

git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@159 48356398-32a2-884e-a903-53898d9a118a
---
 library/HTMLPurifier/Strategy/ValidateAttributes.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/HTMLPurifier/Strategy/ValidateAttributes.php b/library/HTMLPurifier/Strategy/ValidateAttributes.php
index 204ba3a7..fa382cc3 100644
--- a/library/HTMLPurifier/Strategy/ValidateAttributes.php
+++ b/library/HTMLPurifier/Strategy/ValidateAttributes.php
@@ -49,7 +49,7 @@ class HTMLPurifier_Strategy_ValidateAttributes extends HTMLPurifier_Strategy
                 }
                 
                 // put the results into effect
-                if ($result === false) {
+                if ($result === false || $result === null) {
                     $changed = true;
                     unset($attr[$attr_key]);
                 } elseif (is_string($result)) {