From 096855a66a12083b635eeaff7771bb84e28d02e9 Mon Sep 17 00:00:00 2001
From: "Richard M. Stallman" <rms@gnu.org>
Date: Tue, 18 May 1993 04:49:52 +0000
Subject: [PATCH] (struct window): New slot region_showing.

---
 src/window.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/window.h b/src/window.h
index 55bd3d06f79..a7db04810c3 100644
--- a/src/window.h
+++ b/src/window.h
@@ -167,6 +167,9 @@ struct window
        If it is a buffer, it means don't display the line number
        as long as the window shows that buffer.  */
     Lisp_Object base_line_pos;
+    /* If we have highlighted the region (or any part of it),
+       this is the mark position that we used, as an integer.  */
+    Lisp_Object region_showing;
   };
 
 /* 1 if W is a minibuffer window.  */