* libguile/eval.c (scm_m_set_x, scm_m_apply, scm_m_atbind): Use

	* libguile/eval.c (scm_m_set_x, scm_m_apply, scm_m_atbind): Use
	ASSERT_SYNTAX to signal syntax errors.  Avoid unnecessary consing
	when creating the memoized code.

	(scm_m_atbind): Reversed the order, in which the init expressions
	are stored and executed.  The order of execution is now equal to
	the order in which the initializers of the let-forms are executed.
	Use check_bindings and transform_bindings.

	(SCM_CEVAL): Eliminated SCM_NIMP in favor of more appropriate
	!SCM_NULLP.  Added some comments.

	* test-suite/tests/dynamic-scope.test (exception:missing-expr):
	Introduced temporarily until all memoizers use the new way of error
	reporting.