(svn r4660) - Backport from trunk (r4183, r4197, r4217):
Codechange: [Makefile]: removed MANUAL_CONFIG as it's not used anymore
This should hopefully fix the issue where WITH_SDL can be defined while
SDL_CONFIG is not. Added an error if WITH_SDL is defined but SDL_CONFIG
is not.
Replace the dash of SDL_CONFIG/LIBPNG_CONFIG with an underscore

/* $Id$ */

// stdafx.cpp : source file that includes just the standard includes
//	ttd.pch will be the pre-compiled header
//	stdafx.obj will contain the pre-compiled type information

#include "stdafx.h"

// TODO: reference any additional headers you need in STDAFX.H
// and not in this file