Make gcc -Wall happy ("might be used uninitialized...")

    unsigned char ptext_ex[] = "\x54\x85\x9b\x34\x2c\x49\xea\x2a";

    unsigned char ctext_ex[256];

    int plen;

    int clen;

    int clen = 0;

    int num;

    plen = sizeof(ptext_ex) - 1;