From f545feee641476792ac319ae08f92a35085372c9 Mon Sep 17 00:00:00 2001
From: Pascal Massimino <pascal.massimino@gmail.com>
Date: Wed, 8 Oct 2014 08:24:19 +0200
Subject: [PATCH] don't set the alpha value for histogram index image

This leads to tiny extra compression (~few bytes per file) for free

Change-Id: Ia4d8cef3de4365e32eacefd69a57689c80042a23
---
 src/enc/vp8l.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/enc/vp8l.c b/src/enc/vp8l.c
index 1280fd3b..cd84079b 100644
--- a/src/enc/vp8l.c
+++ b/src/enc/vp8l.c
@@ -640,7 +640,7 @@ static WebPEncodingError EncodeImageInternal(VP8LBitWriter* const bw,
       if (histogram_argb == NULL) goto Error;
       for (i = 0; i < histogram_image_xysize; ++i) {
         const int symbol_index = histogram_symbols[i] & 0xffff;
-        histogram_argb[i] = 0xff000000 | (symbol_index << 8);
+        histogram_argb[i] = (symbol_index << 8);
         if (symbol_index >= max_index) {
           max_index = symbol_index + 1;
         }