libcamera: base: extensible: Pass private pointer as unique_ptr<>

The Extensible constructor takes a pointer to a Private instance, whose
lifetime it then manages. Make this explicit in the API by passing the
pointer as a std::unique_ptr<Private>.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

src/libcamera/camera_manager.cpp

@@ -258,7 +258,7 @@ void CameraManager::Private::removeCamera(Camera *camera)
 CameraManager *CameraManager::self_ = nullptr;
 
 CameraManager::CameraManager()
-	: Extensible(new CameraManager::Private())
+	: Extensible(std::make_unique<CameraManager::Private>())
 {
 	if (self_)
 		LOG(Camera, Fatal)