rem: int32 * state, char substitute = B_SUBSTITUTE)
add: int32 * state, char substitute)
context: convert_to_utf8(uint32 srcEncoding,                const char * src, int32 * srcLen,                 char * dst, int32 * dstLen,                int32 * state, char substitute = B_SUBSTITUTE){	const BCharacterSet * charset = BCharacterSetRoster::GetCharacterSetByConversionID(srcEncoding);	if (charset == 0) {		return B_ERROR;	}#if DEBUG_CONV	fprintf(stderr, "convert_to_utf8(%s) : \"", charset->GetName());	for (int i = 0 ; i < *srcLen ; i++) {		fprintf(stderr, "%c", src[i]);	}	fprintf(stderr, "\"\n");#endif	return convert_encoding(charset->GetName(),"UTF-8",src,srcLen,dst,dstLen,state,substitute);}