From 4b948f31073db36f62c79ac9be84ca35465d1c1e Mon Sep 17 00:00:00 2001
From: Paul Ramsey <pramsey@cleverelephant.ca>
Date: Fri, 6 Oct 2017 13:20:05 +0000
Subject: [PATCH] geohash_point_as_int: Fix undefined behaviour in shift
 operation References #3875

git-svn-id: http://svn.osgeo.org/postgis/trunk@15918 b70326c6-7e19-0410-871a-916f4a2858ee
---
 liblwgeom/lwalgorithm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/liblwgeom/lwalgorithm.c b/liblwgeom/lwalgorithm.c
index 69b818a78..27096e80d 100644
--- a/liblwgeom/lwalgorithm.c
+++ b/liblwgeom/lwalgorithm.c
@@ -666,7 +666,7 @@ unsigned int geohash_point_as_int(POINT2D *pt)
 			mid = (lon[0] + lon[1]) / 2;
 			if (longitude > mid)
 			{
-				ch |= 0x0001 << bit;
+				ch |= 0x0001u << bit;
 				lon[0] = mid;
 			}
 			else
-- 
2.40.0