From e10f26df53b92d2aa4a0431480eb4afcfc080820 Mon Sep 17 00:00:00 2001
From: tth <sigfood@dinorama.fr>
Date: Tue, 27 Aug 2019 09:19:25 +0200
Subject: [PATCH] add a comment

---
 lib/fimg-math.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/fimg-math.c b/lib/fimg-math.c
index 4647a25b..097a5b8f 100644
--- a/lib/fimg-math.c
+++ b/lib/fimg-math.c
@@ -66,6 +66,9 @@ for (idx=0; idx<4; idx++)	means[idx] /= (float)surface;
 return 0;
 }
 /* ---------------------------------------------------------------- */
+/*
+ *	more elaborate functions are in fimg-2gray.c
+ */
 int fimg_to_gray(FloatImg *head)
 {
 float		add;