Author: Bernhard M. Wiedemann <bwiedemann suse de>
Date: 2023-01-14
Subject: Fix build in 2038

The UNIX Epoch needs more than 31 bits after 2038-01-19
so we extend the variable to 64 bits

Index: xemacs-21.5.34/src/buffer.h
===================================================================
--- xemacs-21.5.34.orig/src/buffer.h
+++ xemacs-21.5.34/src/buffer.h
@@ -246,7 +246,7 @@ struct buffer
      -1 means visited file was nonexistent.
      0  means visited file modtime unknown; in no case complain
      about any mismatch on next save attempt.  */
-  int modtime;
+  long long modtime;
 
   /* the value of text->modiff at the last auto-save.  */
   long auto_save_modified;