From 3397b6f86d7d3563a8f6ea43ae395bc3a7acb609 Mon Sep 17 00:00:00 2001
From: June McEnroe <june@causal.agency>
Date: Wed, 14 Feb 2018 22:01:48 -0500
Subject: Avoid accessing past last byte in gfxx

---
 bin/gfxx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bin/gfxx.c b/bin/gfxx.c
index 50568c0d..72fe64b8 100644
--- a/bin/gfxx.c
+++ b/bin/gfxx.c
@@ -271,7 +271,7 @@ static void drawBits(struct Iter *it) {
 
 static void drawBytes(struct Iter *it) {
     uint8_t bytes = (BITS_TOTAL + 7) / 8;
-    for (size_t i = offset; i < size; i += bytes) {
+    for (size_t i = offset; i + bytes <= size; i += bytes) {
         uint32_t n = 0;
         for (size_t b = 0; b < bytes; ++b) {
             n <<= 8;
-- 
cgit 1.4.1