Handle shutdown correctly

Author: OpenSauce

src/main.rs

@@ -81,6 +81,11 @@ fn main() {
     while running.load(Ordering::SeqCst) {
         thread::sleep(Duration::from_secs(1));
     }
+
+    _active_client
+        .deactivate()
+        .expect("Failed to deactivate JACK client");
+
     if let Some(rec) = recorder {
         rec.stop(); // join disk thread
     }

src/recorder.rs

@@ -34,7 +34,7 @@ impl Recorder {
 
     pub fn stop(self) {
         drop(self.tx);
-        let _ = self.handle.join();
+        self.handle.join().expect("Unable to join thread");
     }
 }
 
@@ -52,4 +52,6 @@ fn run_writer_thread(sample_rate: u32, filename: String, rx: Receiver<AudioBlock
             writer.write_sample(*sample).unwrap();
         }
     }
+
+    writer.finalize().expect("Failed to finalise WAV file");
 }