Fix scrollbar height

gfxmenu/gui_list.c

@@ -330,7 +330,7 @@ list_paint (void *vself, const grub_video_rect_t *region)
 		      self->bounds.width - box_right_pad
 		      + self->scrollbar_width,
 		      box_top_pad + self->item_padding,
-		      content_rect.height - box_top_pad - box_bottom_pad);
+		      self->bounds.height - box_top_pad - box_bottom_pad);
   }
 
   grub_gui_restore_viewport (&vpsave);