From b4f2c5528311782446be534db3ec04aeb86fa414 Mon Sep 17 00:00:00 2001
From: Owen Rudge <owen@owenrudge.net>
Date: Wed, 22 Jul 2009 00:48:28 -0300
Subject: [PATCH] winhlp32: Ensure win->page is not NULL when selecting Help on
 Help.

---
 programs/winhlp32/macro.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/programs/winhlp32/macro.c b/programs/winhlp32/macro.c
index c2fc3ccc710..fdec6b3dfa5 100644
--- a/programs/winhlp32/macro.c
+++ b/programs/winhlp32/macro.c
@@ -446,10 +446,13 @@ static void CALLBACK MACRO_GotoMark(LPCSTR str)
 
 void CALLBACK MACRO_HelpOn(void)
 {
-    LPCSTR      file;
+    WINHELP_WINDOW *win = MACRO_CurrentWindow();
+    LPCSTR      file = NULL;
 
     WINE_TRACE("()\n");
-    file = MACRO_CurrentWindow()->page->file->help_on_file;
+    if (win && win->page && win->page->file)
+        file = win->page->file->help_on_file;
+
     if (!file)
         file = (Globals.wVersion > 4) ? "winhlp32.hlp" : "winhelp.hlp";