commit c4151be4237804f48ec11ea038877da7497d64a5
Author: Peter Hutterer <peter@cs.unisa.edu.au>
Date:   Thu Apr 24 13:29:46 2008 +0930

    dix: NULL out WindowTable after freeing all the windows.
    
    CloseDownDevices() tries to send PresenceNotify events. If the windows are
    already freed, then we are accessing dangling pointers.

diff --git a/dix/main.c b/dix/main.c
index f7824ee..fad3fe5 100644
--- a/dix/main.c
+++ b/dix/main.c
@@ -464,7 +464,10 @@ main(int argc, char *argv[], char *envp[])
 #endif
 
         config_fini();
+
+        memset(WindowTable, 0, MAXSCREENS * sizeof(WindowPtr));
        CloseDownDevices();
+
        for (i = screenInfo.numScreens - 1; i >= 0; i--)
        {
            FreeScratchPixmapsForScreen(i);