Grob* me = unsmob_grob (smob);
SCM balltype_scm = me->get_property ("duration-log");
- if (!is_number (balltype_scm))
+ if (!ly_c_number_p (balltype_scm))
return Stencil ().smobbed_copy ();
int balltype = ly_scm2int (balltype_scm);
Rest::polyphonic_offset_callback (SCM smob, SCM)
{
Grob* me = unsmob_grob (smob);
- if (is_number (me->get_property ("staff-position")))
+ if (ly_c_number_p (me->get_property ("staff-position")))
return scm_make_real (0);
Direction d = get_grob_direction (me);