Ensure the member function switch_in sets the Pokemon to a valid st…

…ate before it passes itself to a free function.

source/tm/pokemon/active_pokemon.cpp

@@ -813,12 +813,12 @@ struct AnyMutableActivePokemon : ActivePokemonImpl<PokemonType> {
 			this->m_pokemon.set_status(StatusName::poison);
 		}
 		this->m_flags.status.set(this->m_pokemon.status().name());
-		if (this->item(environment) == Item::Berserk_Gene) {
-			activate_berserk_gene(*this, environment);
-		}
 		if (!replacing_fainted_or_initial_switch) {
 			this->m_flags.last_used_move.use_switch();
 		}
+		if (this->item(environment) == Item::Berserk_Gene) {
+			activate_berserk_gene(*this, environment);
+		}
 	}
 
 	constexpr auto switch_out() const -> void {