- SCM_ASSERT_TYPE(ly_number_pair_p (xext), xext, SCM_ARG1, __FUNCTION__, "number pair") ;
- SCM_ASSERT_TYPE(ly_number_pair_p (yext), yext, SCM_ARG2, __FUNCTION__, "number pair") ;
+ SCM_ASSERT_TYPE(is_number_pair (xext), xext, SCM_ARG1, __FUNCTION__, "number pair") ;
+ SCM_ASSERT_TYPE(is_number_pair (yext), yext, SCM_ARG2, __FUNCTION__, "number pair") ;