Merge branch 'fix-closing-point'

component.json

 {
   "name": "d3",
-  "version": "3.1.3",
+  "version": "3.1.4",
   "main": "./d3.js"
 }

d3.js

 d3 = function() {
   var d3 = {
-    version: "3.1.3"
+    version: "3.1.4"
   };
   if (!Date.now) Date.now = function() {
     return +new Date();
@@ -2253,8 +2253,8 @@ d3 = function() {
   function d3_geo_clipPolygon(segments, compare, inside, interpolate, listener) {
     var subject = [], clip = [];
     segments.forEach(function(segment) {
-      if ((n = segment.length) <= 1) return;
-      var n, p0 = segment[0], p1 = segment[n - 1];
+      if ((n = segment.length - 1) <= 0) return;
+      var n, p0 = segment[0], p1 = segment[n];
       if (d3_geo_sphericalEqual(p0, p1)) {
         listener.lineStart();
         for (var i = 0; i < n; ++i) listener.point((p0 = segment[i])[0], p0[1]);

package.json

 {
   "name": "d3",
-  "version": "3.1.3",
+  "version": "3.1.4",
   "description": "A small, free JavaScript library for manipulating documents based on data.",
   "keywords": [
     "dom",

src/geo/clip-polygon.js

@@ -9,8 +9,8 @@ function d3_geo_clipPolygon(segments, compare, inside, interpolate, listener) {
       clip = [];
 
   segments.forEach(function(segment) {
-    if ((n = segment.length) <= 1) return;
-    var n, p0 = segment[0], p1 = segment[n - 1];
+    if ((n = segment.length - 1) <= 0) return;
+    var n, p0 = segment[0], p1 = segment[n];
 
     // If the first and last points of a segment are coincident, then treat as
     // a closed ring.

src/start.js

 d3 = (function(){
-  var d3 = {version: "3.1.3"}; // semver
+  var d3 = {version: "3.1.4"}; // semver