From 7fbe5489ad278f89ba20788310fe0db9f0647898 Mon Sep 17 00:00:00 2001
From: =?utf8?q?V=C3=A1clav=20Slav=C3=ADk?= <vslavik@fastmail.fm>
Date: Sun, 3 Oct 2004 16:31:58 +0000
Subject: [PATCH] fixed crash on invalid data (patch 1039453)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@29625 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 src/html/helpdata.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/html/helpdata.cpp b/src/html/helpdata.cpp
index 5f9d39ea19..327cc5fa4e 100644
--- a/src/html/helpdata.cpp
+++ b/src/html/helpdata.cpp
@@ -78,6 +78,11 @@ wxHtmlHelpIndexCompareFunc(wxHtmlHelpDataItem **a, wxHtmlHelpDataItem **b)
     wxHtmlHelpDataItem *ia = *a;
     wxHtmlHelpDataItem *ib = *b;
 
+    if (ia == NULL)
+        return -1;
+    if (ib == NULL)
+        return 1;
+    
     if (ia->parent == ib->parent)
     {
         return ia->name.CmpNoCase(ib->name);
-- 
2.45.2