From 3b3e255f5eb4dc16fbcaf4f4de08723c540e3ab1 Mon Sep 17 00:00:00 2001
From: artemp <artem@mapnik.org>
Date: Thu, 4 Dec 2014 10:31:56 +0100
Subject: [PATCH] add comment

---
 src/raster_colorizer.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/raster_colorizer.cpp b/src/raster_colorizer.cpp
index 5efb062e8..3aa3531f9 100644
--- a/src/raster_colorizer.cpp
+++ b/src/raster_colorizer.cpp
@@ -154,7 +154,7 @@ void raster_colorizer::colorize(image_data_32 & out, image_data_16 const& in, bo
         std::int16_t value = in_data[i];
         if (nodata && (std::fabs(value - *nodata) < epsilon_))
         {
-            out_data[i] = 0;
+            out_data[i] = 0; // rgba(0,0,0,0)
         }
         else
         {