Change eval.c to use scm_c_vm_run instead of scm_call_with_vm.

Change eval.c to use scm_c_vm_run instead of scm_call_with_vm.

* libguile/eval.c (scm_apply_0, scm_apply_1, scm_apply_2, scm_apply_3)
  (scm_map, scm_for_each, scm_apply): Change to prefer scm_apply_0, and
  to have it call vm_run instead of call_with_vm.
  (eval): Use scm_apply_0 and scm_call_0.

* libguile/srfi-1.c (scm_srfi1_count): Use scm_apply_0.