1 files changed, 3 insertions, 1 deletions

diff --git a/libical/src/libical/icalduration.h b/libical/src/libical/icalduration.h
index dd6e311..0e64cad 100644
--- a/libical/src/libical/icalduration.h
+++ b/libical/src/libical/icalduration.h
@@ -1,60 +1,62 @@
 /* -*- Mode: C -*- */
 /*======================================================================
  FILE: icalduration.h
  CREATOR: eric 26 Jan 2001
 
 
  $Id$
  $Locker$
 
  (C) COPYRIGHT 2000, Eric Busboom, http://www.softwarestudio.org
 
  This program is free software; you can redistribute it and/or modify
  it under the terms of either: 
 
     The LGPL as published by the Free Software Foundation, version
     2.1, available at: http://www.fsf.org/copyleft/lesser.html
 
   Or:
 
     The Mozilla Public License Version 1.0. You may obtain a copy of
     the License at http://www.mozilla.org/MPL/
 
  The Original Code is eric. The Initial Developer of the Original
  Code is Eric Busboom
 
 
 ======================================================================*/
 
 #ifndef ICALDURATION_H
 #define ICALDURATION_H
 
 #include "icaltime.h"
 
 struct icaldurationtype
 {
         int is_neg;
         unsigned int days;
         unsigned int weeks;
         unsigned int hours;
         unsigned int minutes;
         unsigned int seconds;
 };
 
 struct icaldurationtype icaldurationtype_from_int(int t);
 struct icaldurationtype icaldurationtype_from_string(const char*);
 int icaldurationtype_as_int(struct icaldurationtype duration);
 char* icaldurationtype_as_ical_string(struct icaldurationtype d);
-struct icaldurationtype icaldurationtype_null_duration();
+struct icaldurationtype icaldurationtype_null_duration(void);
+struct icaldurationtype icaldurationtype_bad_duration(void);
 int icaldurationtype_is_null_duration(struct icaldurationtype d);
+int icaldurationtype_is_bad_duration(struct icaldurationtype d);
 
 struct icaltimetype  icaltime_add(struct icaltimetype t,
                                   struct icaldurationtype  d);
 
 struct icaldurationtype  icaltime_subtract(struct icaltimetype t1,
                                            struct icaltimetype t2);
 
 #endif /* !ICALDURATION_H */