From 07767951ee8cf17620fd1a7eb86e1bba600c3ba0 Mon Sep 17 00:00:00 2001
From: Dane Springmeyer <dane@mapbox.com>
Date: Thu, 29 May 2014 13:10:51 -0700
Subject: [PATCH] use std::abs

---
 src/clipper/clipper.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/clipper/clipper.cpp b/src/clipper/clipper.cpp
index 95975450e..56ad58416 100755
--- a/src/clipper/clipper.cpp
+++ b/src/clipper/clipper.cpp
@@ -2152,13 +2152,13 @@ void Clipper::IntersectEdges(TEdge *e1, TEdge *e2,
     else if (e1->PolyTyp != e2->PolyTyp)
     {
       //toggle subj open path OutIdx on/off when Abs(clip.WndCnt) == 1 ...
-      if ((e1->WindDelta == 0) && abs(e2->WindCnt) == 1 && 
+      if ((e1->WindDelta == 0) && std::abs(e2->WindCnt) == 1 &&
         (m_ClipType != ctUnion || e2->WindCnt2 == 0))
       {
         AddOutPt(e1, Pt);
         if (e1Contributing) e1->OutIdx = Unassigned;
       }
-      else if ((e2->WindDelta == 0) && (abs(e1->WindCnt) == 1) && 
+      else if ((e2->WindDelta == 0) && (std::abs(e1->WindCnt) == 1) &&
         (m_ClipType != ctUnion || e1->WindCnt2 == 0))
       {
         AddOutPt(e2, Pt);