KICONV_UTF8_REPLACEMENT_CHAR1
*ob++ = KICONV_UTF8_REPLACEMENT_CHAR1;
*ob++ = KICONV_UTF8_REPLACEMENT_CHAR1;
*ob++ = KICONV_UTF8_REPLACEMENT_CHAR1;
*ob++ = KICONV_UTF8_REPLACEMENT_CHAR1;
*ob++ = KICONV_UTF8_REPLACEMENT_CHAR1;
u8[0] == KICONV_UTF8_REPLACEMENT_CHAR1 &&
*ob++ = KICONV_UTF8_REPLACEMENT_CHAR1;
*ob++ = KICONV_UTF8_REPLACEMENT_CHAR1;