From ddea33d93a972ee639b8f9311277c88bad6438b8 Mon Sep 17 00:00:00 2001
From: bubnikv <bubnikv@gmail.com>
Date: Tue, 13 Dec 2016 19:52:28 +0100
Subject: [PATCH] Fixed compilation of ClipperUtils on GCC, which is more
 strict than VS2013 compiler.

---
 xs/src/libslic3r/ClipperUtils.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/xs/src/libslic3r/ClipperUtils.cpp b/xs/src/libslic3r/ClipperUtils.cpp
index 69ba3bfa3..4b6eb77ad 100644
--- a/xs/src/libslic3r/ClipperUtils.cpp
+++ b/xs/src/libslic3r/ClipperUtils.cpp
@@ -463,7 +463,8 @@ ExPolygons
 _clipper_ex(ClipperLib::ClipType clipType, const Polygons &subject, 
     const Polygons &clip, bool safety_offset_)
 {
-    return PolyTreeToExPolygons(_clipper_do<ClipperLib::PolyTree>(clipType, subject, clip, ClipperLib::pftNonZero, safety_offset_));
+    ClipperLib::PolyTree polytree = _clipper_do<ClipperLib::PolyTree>(clipType, subject, clip, ClipperLib::pftNonZero, safety_offset_);
+    return PolyTreeToExPolygons(polytree);
 }
 
 Polylines