More IntelliSense-friendly declarations

Marlin/src/lcd/menu/game/game.h

@@ -53,10 +53,18 @@
 
 // Pool game data to save SRAM
 union MarlinGameData {
-  TERN_(MARLIN_BRICKOUT, brickout_data_t brickout);
-  TERN_(MARLIN_INVADERS, invaders_data_t invaders);
-  TERN_(MARLIN_SNAKE, snake_data_t snake);
-  TERN_(MARLIN_MAZE, maze_data_t maze);
+  #if ENABLED(MARLIN_BRICKOUT)
+    brickout_data_t brickout;
+  #endif
+  #if ENABLED(MARLIN_INVADERS)
+    invaders_data_t invaders;
+  #endif
+  #if ENABLED(MARLIN_SNAKE)
+    snake_data_t snake;
+  #endif
+  #if ENABLED(MARLIN_MAZE)
+    maze_data_t maze;
+  #endif
 };
 
 extern MarlinGameData marlin_game_data;

Marlin/src/lcd/menu/menu_delta_calibrate.cpp

@@ -119,7 +119,9 @@ void lcd_delta_settings() {
 }
 
 void menu_delta_calibrate() {
-  TERN_(DELTA_CALIBRATION_MENU, const bool all_homed = all_axes_homed()); // Acquire ahead of loop
+  #if ENABLED(DELTA_CALIBRATION_MENU)
+    const bool all_homed = all_axes_homed();  // Acquire ahead of loop
+  #endif
 
   START_MENU();
   BACK_ITEM(MSG_MAIN);

Marlin/src/lcd/menu/menu_probe_offset.cpp

@@ -42,7 +42,9 @@
 // Global storage
 float z_offset_backup, calculated_z_offset, z_offset_ref;
 
-TERN_(HAS_LEVELING, bool leveling_was_active);
+#if ENABLED(HAS_LEVELING)
+  bool leveling_was_active;
+#endif
 
 inline void z_clearance_move() {
   do_z_clearance(