from upstream cvs, fixes bug 46889, memory leak in strtotime()

$OpenBSD: patch-ext_date_lib_timelib_h,v 1.1 2008/12/20 21:35:38 sthen Exp $
--- ext/date/lib/timelib.h.orig	Fri Feb 22 09:48:18 2008
+++ ext/date/lib/timelib.h	Fri Dec 19 20:42:27 2008
@@ -28,6 +28,7 @@
 
 #define TIMELIB_NONE             0x00
 #define TIMELIB_OVERRIDE_TIME    0x01
+#define TIMELIB_NO_CLONE         0x02
 
 #define TIMELIB_SPECIAL_WEEKDAY  0x01
 
