Provide forward declarations for yyerror and yylex.

@@ -28,7 +28,8 @@ sieve_machine_t sieve_machine;
 int sieve_error_count;
 
 static void branch_fixup __P((size_t start, size_t end));
- 
+int yyerror (char *s);
+int yylex (); 
 %}
 
 %union {
@@ -509,7 +510,7 @@ string_comp (const void *item, const void *value)
 }
 
 void
-sieve_machine_begin (sieve_machine_t mach, char *file)
+sieve_machine_begin (sieve_machine_t mach, const char *file)
 {
   sieve_machine = mach;
   sieve_error_count = 0;

 %{
 /* GNU Mailutils -- a suite of utilities for electronic mail
-   Copyright (C) 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
+   Copyright (C) 1999, 2000, 2001, 2002, 2004 Free Software Foundation, Inc.
 
    GNU Mailutils is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -20,7 +20,10 @@
 #define obstack_chunk_alloc malloc
 #define obstack_chunk_free free
 #include <obstack.h>
-  
+
+int yyerror (char *s);
+int yylex ();
+ 
 static mh_format_t format;     /* Format structure being built */
 static size_t pc;              /* Program counter. Poins to current
 				  cell in format.prog */