From d80ef43c198d4f57ea557767a26eeedfe04fdd40 Mon Sep 17 00:00:00 2001
From: Scott Lahteine <github@thinkyhead.com>
Date: Mon, 4 Nov 2019 15:40:35 -0600
Subject: [PATCH] Followup to es int patch

---
 Marlin/src/HAL/HAL_AVR/endstop_interrupts.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Marlin/src/HAL/HAL_AVR/endstop_interrupts.h b/Marlin/src/HAL/HAL_AVR/endstop_interrupts.h
index ddea5c6061..77fa581632 100644
--- a/Marlin/src/HAL/HAL_AVR/endstop_interrupts.h
+++ b/Marlin/src/HAL/HAL_AVR/endstop_interrupts.h
@@ -62,7 +62,7 @@ void endstop_ISR() { endstops.update(); }
                                    WITHIN(p, 14, 15) ? 1 : \
                                    WITHIN(p, 62, 69) ? 2 : \
                                    0)
-  
+
   #undef  digitalPinToPCMSK
   #define digitalPinToPCMSK(p)    (WITHIN(p, 10, 13) || WITHIN(p, 50, 53) ? (&PCMSK0) : \
                                    WITHIN(p, 14, 15) ? (&PCMSK1) : \
@@ -94,7 +94,7 @@ void endstop_ISR() { endstops.update(); }
 
 // Install Pin change interrupt for a pin. Can be called multiple times.
 void pciSetup(const int8_t pin) {
-  if (digitalPinToPCMSK(pin) != nullptr) {
+  if (digitalPinHasPCICR(pin)) {
     SBI(*digitalPinToPCMSK(pin), digitalPinToPCMSKbit(pin));  // enable pin
     SBI(PCIFR, digitalPinToPCICRbit(pin)); // clear any outstanding interrupt
     SBI(PCICR, digitalPinToPCICRbit(pin)); // enable interrupt for the group
-- 
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