Fix warning

src/devices/mod.rs

@@ -137,11 +137,11 @@ pub fn connect_compatible_device() -> Result<Box<dyn Device>, DeviceError> {
                 .expect("Why is there a device without packets ???");
 
             test_device.prepare_write();
-            if let Err(e) = test_device
+            if let Err(_e) = test_device
                 .get_device_state()
                 .write_hid_report(&probe_packet)
             {
-                debug_println!("Failed to open: {e:?}");
+                debug_println!("Failed to open: {_e:?}");
                 continue;
             } else {
                 device = Some(test_device);

src/main.rs

@@ -86,10 +86,9 @@ fn main() {
                 };
                 if mute_state.is_some()
                     && mute_state != device.get_device_state().device_properties.muted
+                    && press_mute_key
                 {
-                    if press_mute_key {
-                        enigo.key(Key::F20, Direction::Click).unwrap();
-                    }
+                    enigo.key(Key::F20, Direction::Click).unwrap();
                 }
 
                 // with the default refresh_interval the state is only actively queried every 3min