[mjmartin] 47859: [win32k] - Add Check for spwndNext being null before accessing any of the members. Fixes bugcheck when using cubicexplorer.

Author: mjmartin
Date: Sun Jun 27 12:36:23 2010
New Revision: 47859

URL: http://svn.reactos.org/svn/reactos?rev=47859&view=rev
Log:
[win32k]
- Add Check for spwndNext being null before accessing any of the members. Fixes bugcheck when using cubicexplorer.

Modified:
    trunk/reactos/subsystems/win32/win32k/ntuser/winpos.c

Modified: trunk/reactos/subsystems/win32/win32k/ntuser/winpos.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/subsystems/win32/win32k/ntu...
==============================================================================
--- trunk/reactos/subsystems/win32/win32k/ntuser/winpos.c [iso-8859-1] (original)
+++ trunk/reactos/subsystems/win32/win32k/ntuser/winpos.c [iso-8859-1] Sun Jun 27 12:36:23 2010
@@ -961,7 +961,7 @@
              * itself.
              */
             if ((WinPos->hwnd == WinPos->hwndInsertAfter) ||
-                (WinPos->hwnd == InsAfterWnd->spwndNext->hSelf))
+                ((InsAfterWnd->spwndNext) && (WinPos->hwnd == InsAfterWnd->spwndNext->hSelf)))
             {
                WinPos->flags |= SWP_NOZORDER;
             }
@@ -1006,10 +1006,10 @@
    if (!Window->Wnd) return FALSE;

/* FIXME: Get current active window from active queue. */
-
    /*
     * Only allow CSRSS to mess with the desktop window
     */
+
    if ( Window->hSelf == IntGetDesktopWindow() &&
         Window->pti->pEThread->ThreadsProcess != PsGetCurrentProcess())
    {