Fix typo in DWIN, preheat array

Marlin/src/lcd/dwin/dwin.cpp

@@ -2383,8 +2383,6 @@ void HMI_AxisMove(void) {
   DWIN_UpdateLCD();
 }
 
-enum
-
 /* TemperatureID */
 void HMI_Temperature(void) {
   ENCODER_DiffState encoder_diffState = get_encoder_state();

Marlin/src/lcd/ultralcd.cpp

@@ -86,7 +86,7 @@ MarlinUI ui;
   }
 #endif
 
-#if EITHER(HAS_LCD_MENU, DWIN_CREALITY_LCD)
+#if PREHEAT_COUNT
   preheat_t MarlinUI::material_preset[PREHEAT_COUNT];  // Initialized by settings.load()
 #endif