From 6e197d4a42e2733185e25e0441741b5412f4c046 Mon Sep 17 00:00:00 2001
From: Scott Lahteine <github@thinkyhead.com>
Date: Wed, 6 Dec 2017 20:57:05 -0600
Subject: [PATCH] Fix M503 S parameter

---
 Marlin/Marlin_main.cpp         | 2 +-
 Marlin/configuration_store.cpp | 2 +-
 Marlin/configuration_store.h   | 4 ++--
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index a81219434..9922ffdc8 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -9917,7 +9917,7 @@ inline void gcode_M502() {
    * M503: print settings currently in memory
    */
   inline void gcode_M503() {
-    (void)settings.report(parser.boolval('S'));
+    (void)settings.report(parser.seen('S') && !parser.value_bool());
   }
 #endif
 
diff --git a/Marlin/configuration_store.cpp b/Marlin/configuration_store.cpp
index 7beba4510..364f3532e 100644
--- a/Marlin/configuration_store.cpp
+++ b/Marlin/configuration_store.cpp
@@ -1547,7 +1547,7 @@ void MarlinSettings::reset() {
    *
    * Unless specifically disabled, M503 is available even without EEPROM
    */
-  void MarlinSettings::report(bool forReplay) {
+  void MarlinSettings::report(const bool forReplay) {
 
     /**
      * Announce current units, in case inches are being displayed
diff --git a/Marlin/configuration_store.h b/Marlin/configuration_store.h
index 99e951120..b20a8d488 100644
--- a/Marlin/configuration_store.h
+++ b/Marlin/configuration_store.h
@@ -52,10 +52,10 @@ class MarlinSettings {
     #endif
 
     #if DISABLED(DISABLE_M503)
-      static void report(bool forReplay=false);
+      static void report(const bool forReplay=false);
     #else
       FORCE_INLINE
-      static void report(bool forReplay=false) { UNUSED(forReplay); }
+      static void report(const bool forReplay=false) { UNUSED(forReplay); }
     #endif
 
   private: