Bugfix in get_parent_widget

src/lib/co/src/co_msgwindow.h

 /** 
- * Proview   $Id: co_msgwindow.h,v 1.5 2005-12-15 07:41:17 claes Exp $
+ * Proview   $Id: co_msgwindow.h,v 1.6 2005-12-27 09:28:12 claes Exp $
  * Copyright (C) 2005 SSAB Oxelsund AB.
  *
  * This program is free software; you can redistribute it and/or 
@@ -93,7 +93,12 @@ class MsgWindow {
     static void map_default() { if ( default_window) default_window->map();}
     static void dset_nodraw() { if ( default_window) default_window->set_nodraw();}
     static void dreset_nodraw() { if ( default_window) default_window->reset_nodraw();}
-    static void get_parent_widget( Widget *w) { *w = default_window->parent_wid;}
+    static void get_parent_widget( Widget *w) { 
+      if ( default_window) 
+	*w = default_window->parent_wid;
+      else
+	*w = 0;
+    }
     static void hide_info_messages( int hide) { hide_info = hide;}
 };