libcamera: controls: Index ControlList by unsigned int

In preparation for serialization, index the ControlList by unsigned int.
This will allow deserializing a ControlList without requiring external
information.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>

src/libcamera/camera_controls.cpp

@@ -44,10 +44,10 @@ const std::string &CameraControlValidator::name() const
  * \param[in] id The control ID
  * \return True if the control is valid, false otherwise
  */
-bool CameraControlValidator::validate(const ControlId &id) const
+bool CameraControlValidator::validate(unsigned int id) const
 {
 	const ControlInfoMap &controls = camera_->controls();
-	return controls.find(&id) != controls.end();
+	return controls.find(id) != controls.end();
 }
 
 } /* namespace libcamera */