Add const qualifiers to scrcmd

include/shop.h

@@ -1,8 +1,8 @@
 #ifndef GUARD_SHOP_H
 #define GUARD_SHOP_H
 
-void CreatePokemartMenu(u16 *);
-void CreateDecorationShop1Menu(u16 *);
-void CreateDecorationShop2Menu(u16 *);
+void CreatePokemartMenu(const u16 *);
+void CreateDecorationShop1Menu(const u16 *);
+void CreateDecorationShop2Menu(const u16 *);
 
 #endif // GUARD_SHOP_H