From afb9921d38204704097d954e6649a96b8205d093 Mon Sep 17 00:00:00 2001
From: david gauchard <gauchard@laas.fr>
Date: Sat, 14 Mar 2020 15:34:04 +0100
Subject: [PATCH] avoid printing nullptr string (#7144)

---
 libraries/esp8266/examples/NTP-TZ-DST/NTP-TZ-DST.ino | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/esp8266/examples/NTP-TZ-DST/NTP-TZ-DST.ino b/libraries/esp8266/examples/NTP-TZ-DST/NTP-TZ-DST.ino
index 33cd14603..3a16efb61 100644
--- a/libraries/esp8266/examples/NTP-TZ-DST/NTP-TZ-DST.ino
+++ b/libraries/esp8266/examples/NTP-TZ-DST/NTP-TZ-DST.ino
@@ -134,7 +134,7 @@ void showTime() {
   Serial.println((uint32_t)now);
 
   // timezone and demo in the future
-  Serial.printf("timezone:  %s\n", getenv("TZ"));
+  Serial.printf("timezone:  %s\n", getenv("TZ") ? : "(none)");
 
   // human readable
   Serial.print("ctime:     ");