Denying unauthorized commands

Privileged commands will be denied if there is no active authorized session:

#[test]
fn deny_input_floor() {
   unsafe {
      magic::override_reset_state();
      magic::issue_override_code(4);
      magic::issue_override_code(2);
      assert!(magic::poll_override_error() == 3);
   }
}

#[test]
fn deny_manual_mode() {
   unsafe {
      magic::override_reset_state();
      magic::issue_override_code(5);
      assert!(magic::poll_override_error() == 3);
   }
}

#[test]
fn deny_normal_mode() {
   unsafe {
      magic::override_reset_state();
      magic::issue_override_code(6);
      assert!(magic::poll_override_error() == 3);
   }
}