From afbc049cc91e91bbd8f50586fdfb3ce874d3f91e Mon Sep 17 00:00:00 2001
From: Christopher Pascoe <alltheblinkythings@gmail.com>
Date: Wed, 9 Dec 2015 22:51:57 -0800
Subject: [PATCH] Make the circular buffer's _size and _bufend members
 immutable.

---
 cores/esp8266/cbuf.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/cores/esp8266/cbuf.h b/cores/esp8266/cbuf.h
index 087e7200b..02b612c5c 100644
--- a/cores/esp8266/cbuf.h
+++ b/cores/esp8266/cbuf.h
@@ -113,9 +113,9 @@ class cbuf {
             return (ptr == _bufend) ? _buf : ptr;
         }
 
-        size_t _size;
+        const size_t _size;
         char* _buf;
-        char* _bufend;
+        const char* const _bufend;
         char* _begin;
         char* _end;
 };