Fixes for -O3 from some other old e-mail

Found another e-mail from 1999:

Subject: DJGPP-libini failure found ?!
Date: Fri, 17 Dec 1999 21:17:53 +0100
From: Gero Timann <geti@online.de>
To: stealth.tech@seznam.cz

Hello,

may be, i've found a failure in your LIBINI: Compilation with -O3 (gcc
egcs 2.91.66)
result in very strange results. My solution: replace every "const char*"
with "char*".
Now everything work propertly.

Gero