From 7c5ac7bf0772c651cf55052a6a1c8fd7d12afff0 Mon Sep 17 00:00:00 2001
From: Bborie Park <bkpark at ucdavis.edu>
Date: Mon, 18 Jun 2012 22:48:04 +0000
Subject: [PATCH] Addition of comments to RASTER_mapAlgebra2()

git-svn-id: http://svn.osgeo.org/postgis/trunk@9945 b70326c6-7e19-0410-871a-916f4a2858ee
---
 raster/rt_pg/rt_pg.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/raster/rt_pg/rt_pg.c b/raster/rt_pg/rt_pg.c
index 557bdfce3..df747bc68 100644
--- a/raster/rt_pg/rt_pg.c
+++ b/raster/rt_pg/rt_pg.c
@@ -9753,10 +9753,12 @@ Datum RASTER_mapAlgebra2(PG_FUNCTION_ARGS)
 		(rast[0] == NULL || _isempty[0]) ||
 		(rast[1] == NULL || _isempty[1])
 	) {
+		/* first raster is empty */
 		if (rast[0] == NULL || _isempty[0]) {
 			i = 0;
 			j = 1;
 		}
+		/* second raster is empty */
 		else {
 			i = 1;
 			j = 0;
-- 
2.40.0