🩹 Fix HOTEND_IDLE_TIMEOUT with no heated bed (MarlinFirmware#26746)

Author: thisiskeithb

Marlin/src/feature/hotend_idle.h

@@ -32,7 +32,9 @@ typedef struct {
     timeout       = HOTEND_IDLE_TIMEOUT_SEC;
     trigger       = HOTEND_IDLE_MIN_TRIGGER;
     nozzle_target = HOTEND_IDLE_NOZZLE_TARGET;
-    bed_target    = HOTEND_IDLE_BED_TARGET;
+    #if HAS_HEATED_BED
+      bed_target  = HOTEND_IDLE_BED_TARGET;
+    #endif
   }
 } hotend_idle_settings_t;
 

Marlin/src/lcd/menu/menu_configuration.cpp

@@ -265,7 +265,9 @@ void menu_advanced_settings();
     EDIT_ITEM(int3, MSG_TIMEOUT, &c.timeout, 0, 999);
     EDIT_ITEM(int3, MSG_TEMPERATURE, &c.trigger, 0, thermalManager.hotend_max_target(0));
     EDIT_ITEM(int3, MSG_HOTEND_IDLE_NOZZLE_TARGET, &c.nozzle_target, 0, thermalManager.hotend_max_target(0));
-    EDIT_ITEM(int3, MSG_HOTEND_IDLE_BED_TARGET, &c.bed_target, 0, BED_MAX_TARGET);
+    #if HAS_HEATED_BED
+      EDIT_ITEM(int3, MSG_HOTEND_IDLE_BED_TARGET, &c.bed_target, 0, BED_MAX_TARGET);
+    #endif
 
     END_MENU();
   }