From 3b37b35a755de9cf1781c62da62565a346b17e20 Mon Sep 17 00:00:00 2001
From: dav1901 <44604348+dav1901@users.noreply.github.com>
Date: Wed, 7 Nov 2018 18:31:53 +0200
Subject: [PATCH] Update String::concat

---
 cores/arduino/WString.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/cores/arduino/WString.cpp b/cores/arduino/WString.cpp
index 71bbc07d1..0c1fbf532 100644
--- a/cores/arduino/WString.cpp
+++ b/cores/arduino/WString.cpp
@@ -281,6 +281,7 @@ unsigned char String::concat(const char *cstr)
 
 unsigned char String::concat(char c)
 {
+	if (c == '\0') return 1;
 	char buf[2];
 	buf[0] = c;
 	buf[1] = 0;