From: Martin Mares <mj@ucw.cz>
Date: Sun, 10 Nov 2019 15:18:19 +0000 (+0100)
Subject: Aircon: Do not crash on receiving 0x00 on debug USART
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;h=e115c8d6668f23fba3a09e6f1619792a6e4a509d;p=home-hw.git

Aircon: Do not crash on receiving 0x00 on debug USART

This happens during initialization if the debug port is not connected.
---

diff --git a/aircon/firmware/main.c b/aircon/firmware/main.c
index c430121..129ac71 100644
--- a/aircon/firmware/main.c
+++ b/aircon/firmware/main.c
@@ -347,6 +347,8 @@ static bool rc_send(char key)
 {
 	if (rc_pending)
 		return false;
+	if (!key)
+		return false;
 
 	const char *s = strchr(rc_keys, key);
 	if (!s)