Use list LIFO access where appropriate.

* libmu_sieve/runtime.c (_mu_sv_instr_push)
(_mu_sv_instr_pop): Use mu_list_push and mu_list_pop.
* mail/alias.c (recursive_alias_expand): Likewise.

@@ -131,7 +131,7 @@ _mu_sv_instr_push (mu_sieve_machine_t mach)
       mu_sieve_error (mach, _("cannot create stack"));
       mu_sieve_error (mach, _("cannot create stack"));
       mu_sieve_abort (mach);
       mu_sieve_abort (mach);
     }
     }
-  mu_list_prepend (mach->stack, (void*) mach->reg);
+  mu_list_push (mach->stack, (void*) mach->reg);
 }
 }
 
 
 void
 void
@@ -149,8 +149,7 @@ _mu_sv_instr_pop (mu_sieve_machine_t mach)
       mu_sieve_error (mach, _("stack underflow"));
       mu_sieve_error (mach, _("stack underflow"));
       mu_sieve_abort (mach);
       mu_sieve_abort (mach);
     }
     }
-  mu_list_get (mach->stack, 0, (void **)&mach->reg);
-  mu_list_remove (mach->stack, (void *)mach->reg);
+  mu_list_pop (mach->stack, (void **)&mach->reg);
 }
 }
 
 
 void
 void

@@ -131,9 +131,9 @@ recursive_alias_expand (const char *name, mu_list_t exlist, mu_list_t origlist)
       mu_iterator_current (itr, (void **)&word);
       mu_iterator_current (itr, (void **)&word);
       if (mu_list_locate (origlist, word, NULL) == MU_ERR_NOENT)
       if (mu_list_locate (origlist, word, NULL) == MU_ERR_NOENT)
 	{
 	{
-	  mu_list_prepend (origlist, word);
+	  mu_list_push (origlist, word);
 	  recursive_alias_expand (word, exlist, origlist);
 	  recursive_alias_expand (word, exlist, origlist);
-	  mu_list_remove (origlist, word);
+	  mu_list_pop (origlist, NULL);
 	}
 	}
     }
     }
   mu_iterator_destroy (&itr);
   mu_iterator_destroy (&itr);