Crypt::Rijndael				T_PTROBJ
IVEC	T_IVEC

INPUT
T_IVEC
    {
	const char* ret;
	STRLEN size;
	$var = ($type)SvPVbyte($arg, size);
	if (size != RIJNDAEL_BLOCKSIZE)
		Perl_croak(aTHX_ \"set_iv: initial value must be the blocksize (%d bytes), but was %d bytes\", RIJNDAEL_BLOCKSIZE, size);
	}
