Owen Rudge : winhlp32: Ensure win-> page is not NULL when selecting Help on Help.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: b4f2c5528311782446be534db3ec04aeb86fa414
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=b4f2c5528311782446be534db3ec04aeb86fa414

Author: Owen Rudge <owen at owenrudge.net>
Date:   Wed Jul 22 00:48:28 2009 -0300

winhlp32: Ensure win->page is not NULL when selecting Help on Help.

---

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

diff --git a/programs/winhlp32/macro.c b/programs/winhlp32/macro.c
index c2fc3cc..fdec6b3 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";