(Ffile_name_directory) [DOS_NT]: Don't declare `beg'

`const' since CORRECT_DIR_SEPS modifies its target.

src/ChangeLog

+2002-08-19  Eli Zaretskii  <eliz@is.elta.co.il>
+
+	* fileio.c (Ffile_name_directory) [DOS_NT]: Don't declare `beg'
+	`const' since CORRECT_DIR_SEPS modifies its target.
+
 2002-08-19  Kim F. Storm  <storm@cua.dk>
 
 	* keyboard.c (Fclear_this_command_keys): Added optional arg

src/fileio.c

@@ -393,7 +393,11 @@ on VMS, perhaps instead a string ending in `:', `]' or `>'.  */)
      (filename)
      Lisp_Object filename;
 {
+#ifndef DOS_NT
   register const unsigned char *beg;
+#else
+  register unsigned char *beg;
+#endif
   register const unsigned char *p;
   Lisp_Object handler;