From bbb95e04b36dfdbe0e452ea260e73fb2a5ad4801 Mon Sep 17 00:00:00 2001
From: Barend Gehrels <barend@xs4all.nl>
Date: Sun, 22 Jul 2012 13:31:26 +0000
Subject: [PATCH] [geometry] rephrased solution to avoid signed/unsigned
 warning

[SVN r79671]
---
 .../algorithms/detail/overlay/convert_ring.hpp | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/include/boost/geometry/algorithms/detail/overlay/convert_ring.hpp b/include/boost/geometry/algorithms/detail/overlay/convert_ring.hpp
index ae86fb1d9..51955b515 100644
--- a/include/boost/geometry/algorithms/detail/overlay/convert_ring.hpp
+++ b/include/boost/geometry/algorithms/detail/overlay/convert_ring.hpp
@@ -77,15 +77,15 @@ struct convert_ring<polygon_tag>
         }
         else
         {
-            // Avoid adding interior rings which are invalid because of number of points:
-            if (geometry::num_points(source) >=
-                    core_detail::closure::minimum_ring_size
-                        <
-                            geometry::closure
-                                <
-                                    Destination
-                                >::value
-                        >::value)
+            // Avoid adding interior rings which are invalid
+            // because of its number of points:
+            std::size_t const min_num_points
+                    = core_detail::closure::minimum_ring_size
+                            <
+                                geometry::closure<Destination>::value
+                            >::value;
+
+            if (geometry::num_points(source) >= min_num_points)
             {
                 interior_rings(destination).resize(
                             interior_rings(destination).size() + 1);