Add ability to configure settings PIN at compile time

wled00/wled.h

@@ -214,6 +214,10 @@ using PSRAMDynamicJsonDocument = BasicJsonDocument<PSRAM_Allocator>;
   #define WLED_AP_PASS DEFAULT_AP_PASS
 #endif
 
+#ifndef WLED_PIN
+  #define WLED_PIN ""
+#endif
+
 #ifndef SPIFFS_EDITOR_AIRCOOOKIE
   #error You are not using the Aircoookie fork of the ESPAsyncWebserver library.\
   Using upstream puts your WiFi password at risk of being served by the filesystem.\
@@ -556,10 +560,10 @@ WLED_GLOBAL byte macroLongPress[WLED_MAX_BUTTONS]     _INIT({0});
 WLED_GLOBAL byte macroDoublePress[WLED_MAX_BUTTONS]   _INIT({0});
 
 // Security CONFIG
-WLED_GLOBAL bool otaLock     _INIT(false);  // prevents OTA firmware updates without password. ALWAYS enable if system exposed to any public networks
-WLED_GLOBAL bool wifiLock    _INIT(false);  // prevents access to WiFi settings when OTA lock is enabled
-WLED_GLOBAL bool aOtaEnabled _INIT(true);   // ArduinoOTA allows easy updates directly from the IDE. Careful, it does not auto-disable when OTA lock is on
-WLED_GLOBAL char settingsPIN[5] _INIT("");  // PIN for settings pages
+WLED_GLOBAL bool otaLock        _INIT(false);     // prevents OTA firmware updates without password. ALWAYS enable if system exposed to any public networks
+WLED_GLOBAL bool wifiLock       _INIT(false);     // prevents access to WiFi settings when OTA lock is enabled
+WLED_GLOBAL bool aOtaEnabled    _INIT(true);      // ArduinoOTA allows easy updates directly from the IDE. Careful, it does not auto-disable when OTA lock is on
+WLED_GLOBAL char settingsPIN[5] _INIT(WLED_PIN);  // PIN for settings pages
 WLED_GLOBAL bool correctPIN     _INIT(true);
 WLED_GLOBAL unsigned long lastEditTime _INIT(0);