From 01f80f81162425e6c93c5abe8da6d31c45226b01 Mon Sep 17 00:00:00 2001
From: Costa Vitor <vitor@quasar-20.(none)>
Date: Mon, 1 Jun 2009 16:42:17 -0500
Subject: [PATCH] -1 is the error in datime

---
 library/system/sys.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/system/sys.c b/library/system/sys.c
index 5499614c0..fa17de23c 100644
--- a/library/system/sys.c
+++ b/library/system/sys.c
@@ -207,7 +207,7 @@ sysmktime(void)
   loc.tm_sec = YAP_IntOfTerm(YAP_ARG6);
   loc.tm_isdst = daylight;
 
-  if ((tim = mktime(&loc)) < 0) {
+  if ((tim = mktime(&loc)) == (time_t)-1) {
     return YAP_Unify(YAP_ARG8, YAP_MkIntTerm(errno));
   }
   return YAP_Unify(YAP_ARG7,YAP_MkIntTerm(tim));