patch 7.4.730 Problem: When setting the crypt key and using a swap file, text may be encrypted twice or unencrypted text remains in the swap file. (Issue 369) Solution: Call ml_preserve() before re-encrypting. Set correct index for next pointer block.

/* vim:ts=8 sts=4:sw=4
 *
 * VIM - Vi IMproved	by Bram Moolenaar
 *
 * Do ":help uganda"  in Vim to read copying and usage conditions.
 * Do ":help credits" in Vim to see a list of people who contributed.
 */

/*
 * Atari MiNT Machine-dependent things.
 */

#define BINARY_FILE_IO