-MAKE_SCHEME_CALLBACK_WITH_OPTARGS (Rest_collision, force_shift_callback_rest, 2, 1);
+MAKE_SCHEME_CALLBACK_WITH_OPTARGS (Rest_collision, force_shift_callback_rest, 2, 1, "");
Grob *rest = Note_column::get_rest (rcol);
Grob *common = common_refpoint_of_array (notes, rcol, Y_AXIS);
Interval restdim = rcol->extent (common, Y_AXIS);
if (restdim.is_empty ())
Grob *rest = Note_column::get_rest (rcol);
Grob *common = common_refpoint_of_array (notes, rcol, Y_AXIS);
Interval restdim = rcol->extent (common, Y_AXIS);
if (restdim.is_empty ())
Real staff_space = Staff_symbol_referencer::staff_space (rcol);
Real minimum_dist = robust_scm2double (me->get_property ("minimum-distance"), 1.0) * staff_space;
Real staff_space = Staff_symbol_referencer::staff_space (rcol);
Real minimum_dist = robust_scm2double (me->get_property ("minimum-distance"), 1.0) * staff_space;