From a56db06efbd0ffe62739c5291ce698c7da9def17 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <andrew@tridgell.net>
Date: Wed, 4 Aug 2021 10:24:17 +1000
Subject: [PATCH] AP_Relay: fixed formatting of pin arming check

---
 libraries/AP_Relay/AP_Relay.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libraries/AP_Relay/AP_Relay.cpp b/libraries/AP_Relay/AP_Relay.cpp
index fb0a1db612..a7679050a2 100644
--- a/libraries/AP_Relay/AP_Relay.cpp
+++ b/libraries/AP_Relay/AP_Relay.cpp
@@ -157,7 +157,7 @@ bool AP_Relay::arming_checks(size_t buflen, char *buffer) const
 {
     for (uint8_t i=0; i<AP_RELAY_NUM_RELAYS; i++) {
         if (_pin[i] != -1 && !hal.gpio->valid_pin(_pin[i])) {
-            hal.util->snprintf(buffer, buflen, "Relay[%u] pin %d invalid", i + 1, _pin[i]);
+            hal.util->snprintf(buffer, buflen, "Relay[%u] pin %d invalid", unsigned(i + 1), int(_pin[i].get()));
             return false;
         }
     }