Suppress thisItemNr warning (#17049)

Marlin/src/lcd/menu/menu.h

@@ -322,10 +322,10 @@ class MenuItem_bool : public MenuEditItemBase {
  *   _menuLineNr is the menu item to draw and process
  *   _thisItemNr is the index of each MENU_ITEM or STATIC_ITEM
  */
-#define SCREEN_OR_MENU_LOOP(IS_MENU)                \
-  scroll_screen(IS_MENU ? 1 : LCD_HEIGHT, IS_MENU); \
-  int8_t _menuLineNr = encoderTopLine, _thisItemNr; \
-  bool _skipStatic = IS_MENU; UNUSED(_thisItemNr);  \
+#define SCREEN_OR_MENU_LOOP(IS_MENU)                    \
+  scroll_screen(IS_MENU ? 1 : LCD_HEIGHT, IS_MENU);     \
+  int8_t _menuLineNr = encoderTopLine, _thisItemNr = 0; \
+  bool _skipStatic = IS_MENU; UNUSED(_thisItemNr);      \
   for (int8_t _lcdLineNr = 0; _lcdLineNr < LCD_HEIGHT; _lcdLineNr++, _menuLineNr++) { \
     _thisItemNr = 0