✨ M81 D / S - Power-off Delay (#23396, #23455)

Marlin/src/module/temperature.h

@@ -994,7 +994,12 @@ class Temperature {
       static int16_t read_max_tc(TERN_(HAS_MULTI_MAX_TC, const uint8_t hindex=0));
     #endif
 
-    static void update_autofans();
+    #if HAS_AUTO_FAN
+      #if ENABLED(POWER_OFF_WAIT_FOR_COOLDOWN)
+        static bool autofans_on;
+      #endif
+      static void update_autofans();
+    #endif
 
     #if HAS_HOTEND
       static float get_pid_output_hotend(const uint8_t e);