always check timeout condition

src/pamfido2.rs

@@ -136,6 +136,10 @@ impl PamFido2 {
                 .compat()?
                 .filter_map(|handle| FidoDevice::new(&handle).ok())
                 .collect::<Vec<_>>();
+            if begin.elapsed().unwrap() > settings.device_timeout {
+                debug(&|| format!("Exceeded {:?} timeout", settings.device_timeout));
+                return Ok(PamError::AUTH_ERR);
+            }
             if devices.is_empty() {
                 debug(&|| "Please connect your authenicator!".into());
                 std::thread::sleep(Duration::from_secs(1));