- if (scm_paper_width == SCM_UNDEFINED
- || scm_left_margin_default == SCM_UNDEFINED
- || scm_right_margin_default == SCM_UNDEFINED)
+ if (SCM_UNBNDP (scm_paper_width)
+ || SCM_UNBNDP (scm_left_margin_default)
+ || SCM_UNBNDP (scm_right_margin_default))