Update from gnulib.

lib/backupfile.c

@@ -1,6 +1,7 @@
 /* backupfile.c -- make Emacs style backup file names
-   Copyright (C) 1990,91,92,93,94,95,96,97,98,99,2000, 2001, 2002 Free Software
-   Foundation, Inc.
+
+   Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+   1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -24,8 +25,8 @@
 # include <config.h>
 #endif
 
+#include <stddef.h>
 #include <stdio.h>
-#include <sys/types.h>
 #if HAVE_STRING_H
 # include <string.h>
 #else
@@ -80,12 +81,8 @@ char *malloc ();
 # define HAVE_DIR 0
 #endif
 
-#if HAVE_LIMITS_H
-# include <limits.h>
-#endif
-#ifndef CHAR_BIT
-# define CHAR_BIT 8
-#endif
+#include <limits.h>
+
 /* Upper bound on the string length of an integer converted to string.
    302 / 1000 is ceil (log10 (2.0)).  Subtract 1 for the sign bit;
    add 1 for integer division truncation; add 1 more for a minus sign.  */