works

Marlin/src/lcd/ultralcd.cpp

     #endif
 
     #if HAS_LCD_CONTRAST
-      MENU_ITEM_EDIT_CALLBACK(int3, MSG_CONTRAST, &lcd_contrast, LCD_CONTRAST_MIN, LCD_CONTRAST_MAX, lcd_callback_set_contrast, true);
+      MENU_ITEM_EDIT_CALLBACK(int3, MSG_CONTRAST, (int16_t*) &lcd_contrast, LCD_CONTRAST_MIN, LCD_CONTRAST_MAX, lcd_callback_set_contrast, true);
     #endif
     #if ENABLED(FWRETRACT)
       MENU_ITEM(submenu, MSG_RETRACT, lcd_control_retract_menu);