image *		T_image

INPUT

T_image
	if (!(
           SvROK ($arg)
           && SvOBJECT (SvRV ($arg))
           && sv_derived_from ($arg, \"Image::Scale::XS\")
        ))
          croak (\"object is not of type Image::Scale::XS\");
        /**/
        $var = (image *)SvPVX (SvRV ($arg));