tests: fix compilation

src/it/test_backend.rs

@@ -246,6 +246,10 @@ impl Connector for TestConnector {
     fn drm_dev(&self) -> Option<DrmDeviceId> {
         None
     }
+
+    fn set_enabled(&self, _enabled: bool) {
+        // todo
+    }
 }
 
 pub struct TestMouseClick {

src/it/test_config.rs

@@ -104,6 +104,7 @@ unsafe extern "C" fn handle_msg(data: *const u8, msg: *const u8, size: usize) {
         ServerMessage::Clear => tc.clear(),
         ServerMessage::NewDrmDev { .. } => {}
         ServerMessage::DelDrmDev { .. } => {}
+        ServerMessage::Idle => {}
     }
 }