From e160ed4e5e9561515ebe77a09797e522629a5765 Mon Sep 17 00:00:00 2001
From: Francesco Abbate <francesco.bbt@gmail.com>
Date: Sat, 20 Mar 2021 23:05:09 +0100
Subject: [PATCH] Add comments about unused RenFont data field

---
 src/renderer.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/renderer.c b/src/renderer.c
index d5e86d47..562dc0e8 100644
--- a/src/renderer.c
+++ b/src/renderer.c
@@ -18,8 +18,11 @@ struct GlyphSet {
 };
 typedef struct GlyphSet GlyphSet;
 
+/* The field "padding" below must be there just before GlyphSet *sets[MAX_GLYPHSET]
+   because the field "sets" can be indexed and writted with an index -1. For this
+   reason the "padding" field must be there but is never explicitly used. */
 struct RenFont {
-  void *data;
+  GlyphSet *padding;
   GlyphSet *sets[MAX_GLYPHSET];
   float size;
   int height;