CP850 is used by the mortevielle engine (and apparently by other
engines too). Anytime an engine using CP850 encoding wants to use
the TTS, the encoding has to be converted, so this is pretty
important encoding conversion to support. Unfortunately SDL
(when compiled without iconv) doesn't support this encoding
(which means, there might not be a way to convert this encoding
on some platforms), so I added a conversion table for this.
Move #include<iconv.h> from common/encoding.h to
common/encoding.cpp and change the methods accordingly.
This resulted in not saving the iconvHandle if using the
"non-static" version of conversion, but it simplified the code
and hopefuly resolved issues with forbidden symbols on some
platforms.
Thil should fix the ds build. For some reason
I thought the forbidden.h wouldn't allow me to
include the iconv.h, so I tryed to include it
before the forbidden.h (it seems like I didn't
have to do that.)
