* xdisp.c (display_mode_line): Use x_implicitly_set_name here.

	* xdisp.c (redisplay, init_xdisp): Use FRAME_ROOT_WINDOW instead
	of minibuf_window->prev.

	* xdisp.c (decode_mode_spec): Move lots_of_dashes outside of the
	function; Emacs can't use static initialized arrays inside functions.

src/xdisp.c

@@ -596,7 +596,7 @@ redisplay ()
       XFASTINT (w->last_point_y) = FRAME_CURSOR_Y (selected_frame);
 
       if (all_windows)
-	mark_window_display_accurate (XWINDOW (minibuf_window)->prev, 1);
+	mark_window_display_accurate (FRAME_ROOT_WINDOW (selected_frame), 1);
       else
 	{
 	  w->update_mode_line = Qnil;
@@ -1781,10 +1781,10 @@ display_mode_line (w)
   if (FRAME_X_P (f)
       && ! FRAME_MINIBUF_ONLY_P (f)
       && w == XWINDOW (f->selected_window))
-    x_set_name (f, ((XINT (Flength (Vframe_list)) > 1)
-		    ? XBUFFER (w->buffer)->name
-		    : Qnil),
-		Qnil);
+    x_implicitly_set_name (f, ((XINT (Flength (Vframe_list)) > 1)
+			       ? XBUFFER (w->buffer)->name
+			       : Qnil),
+			   Qnil);
 #endif
 }
 
@@ -1999,6 +1999,8 @@ display_mode_element (w, vpos, hpos, depth, minendcol, maxendcol, elt)
 /* Return a string for the output of a mode line %-spec for window W,
    generated by character C and width MAXWIDTH.  */
 
+static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------";
+
 static char *
 decode_mode_spec (w, c, maxwidth)
      struct window *w;
@@ -2125,7 +2127,6 @@ decode_mode_spec (w, c, maxwidth)
       
     case '-':
       {
-	static char lots_of_dashes[] = "--------------------------------------------------------------------------------------------------------------------------------------------";
 	register char *p;
 	register int i;
 	
@@ -2149,6 +2150,7 @@ decode_mode_spec (w, c, maxwidth)
 
 /* Display STRING on one line of window W, starting at HPOS.
    Display at position VPOS.  Caller should have done get_display_line.
+   If VPOS == -1, display it as the current frame's title.
 
   TRUNCATE is GLYPH to display at end if truncated.  Zero for none.
 
@@ -2327,7 +2329,7 @@ init_xdisp ()
   this_line_bufpos = 0;
 
   mini_w = XWINDOW (minibuf_window);
-  root_window = mini_w->prev;
+  root_window = FRAME_ROOT_WINDOW (XFRAME (WINDOW_FRAME (mini_w)));
 
   echo_area_glyphs = 0;
   previous_echo_glyphs = 0;