multi key action

srcs/cube3d.c

@@ -9,6 +9,8 @@ int		main(int ac, char **av)
 
 	// receive a keypress event
 	mlx_hook(game->win_ptr, 2, 1L << 0, keypress, game);
+	// receive a keyprelease event
+	mlx_hook(game->win_ptr, 3, 1L << 1, keyrelease, game);
 	// receive event when clicking the red button to close the window
 	mlx_hook(game->win_ptr, 17, 1L << 17, shut_down, game);
 	// infinite loop that waits for events to occurs