TYPEMAP
Instance *		WRAPPED_C_OBJECT


INPUT
WRAPPED_C_OBJECT
	$var = (($type)SvIV(SvRV($arg)))

OUTPUT
WRAPPED_C_OBJECT
	/* 'class' must be an argument to any function that returns this datatype */
	$arg = sv_setref_pv(newSViv(0), class, (void *)$var);

