Use unique_ptr for alternate_ham_file
Write tmap_info carefully
Use d_fname for DOS filenames
Use unique_ptr for overwritten_text
Use unique_ptr for text strings
Use unique_ptr for secret_level_table
Use unique_ptr for secret_level_names
Use unique_ptr for level_names
Use unique_ptr for start_poll_data
Use unique_ptr for BitmapBits
Use unique_ptr for SoundBits
Use unique_ptr for Bitmap_replacement_data
Use unique_ptr for d1_tmap_nums