From dd07c28a3257659ea897bad236687673f3401ebe Mon Sep 17 00:00:00 2001
From: Paul Ramsey <pramsey@cleverelephant.ca>
Date: Mon, 25 May 2015 18:07:54 +0000
Subject: [PATCH] Fix crasher found in garden tests

git-svn-id: http://svn.osgeo.org/postgis/trunk@13554 b70326c6-7e19-0410-871a-916f4a2858ee
---
 liblwgeom/ptarray.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/liblwgeom/ptarray.c b/liblwgeom/ptarray.c
index 4d3803b28..6e7a6c2b5 100644
--- a/liblwgeom/ptarray.c
+++ b/liblwgeom/ptarray.c
@@ -1304,17 +1304,19 @@ ptarray_locate_point(const POINTARRAY *pa, const POINT4D *p4d, double *mindistou
 	
 	if ( ! proj4d ) proj4d = &projtmp;
 	
+	start = getPoint2d_cp(pa, 0);
+	
 	/* If the pointarray has only one point, the nearest point is */
 	/* just that point */
 	if ( pa->npoints == 1 )
 	{
 		getPoint4d_p(pa, 0, proj4d);
-		*mindistout = distance2d_pt_pt(&p, start);
+		if ( mindistout )
+			*mindistout = distance2d_pt_pt(&p, start);
 		return 0.0;
 	}
 	
 	/* Loop through pointarray looking for nearest segment */
-	start = getPoint2d_cp(pa, 0);
 	for (t=1; t<pa->npoints; t++)
 	{
 		double dist;
-- 
2.40.0