From 85eee8d45749fad8e96d99d990f67297002d2231 Mon Sep 17 00:00:00 2001
From: Sandro Santilli <strk@keybit.net>
Date: Sat, 20 Jun 2009 21:25:15 +0000
Subject: [PATCH] Handle empty polygon rings

git-svn-id: http://svn.osgeo.org/postgis/trunk@4187 b70326c6-7e19-0410-871a-916f4a2858ee
---
 liblwgeom/measures.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/liblwgeom/measures.c b/liblwgeom/measures.c
index 124fcbf9d..ea6592b81 100644
--- a/liblwgeom/measures.c
+++ b/liblwgeom/measures.c
@@ -588,6 +588,7 @@ lwgeom_polygon_area(LWPOLY *poly)
 
 		LWDEBUGF(4, " rings %d has %d points", i, ring->npoints);
 
+		if ( ! ring->npoints ) continue; /* empty ring */
 		for (j=0; j<ring->npoints-1; j++)
 		{
 			getPoint2d_p(ring, j, &p1);
-- 
2.49.0