(do_switch_frame): Mark previously displayed frame as obscured for

FRAME_MSDOS_P frames as well.

src/ChangeLog

+2008-08-25  Eli Zaretskii  <eliz@gnu.org>
+
+	* frame.c (do_switch_frame): Mark previously displayed frame as
+	obscured for FRAME_MSDOS_P frames as well.
+
 2008-08-24  Eli Zaretskii  <eliz@gnu.org>
 
 	* frame.c (make_terminal_frame): Initialize f->terminal,

src/frame.c

@@ -876,7 +876,7 @@ do_switch_frame (frame, track, for_deletion)
   if (!for_deletion && FRAME_HAS_MINIBUF_P (sf))
     resize_mini_window (XWINDOW (FRAME_MINIBUF_WINDOW (sf)), 1);
 
-  if (FRAME_TERMCAP_P (XFRAME (frame)))
+  if (FRAME_TERMCAP_P (XFRAME (frame)) || FRAME_MSDOS_P (XFRAME (frame)))
     {
       if (FRAMEP (FRAME_TTY (XFRAME (frame))->top_frame))
 	/* Mark previously displayed frame as now obscured.  */