StimBuff: DevAttSpec should be a sh_ptr, not a plain ref

include/user/stimulusBuffer.h

@@ -48,7 +48,8 @@ public:
 
 public:
 	explicit StimulusBuffer(
-		const device::DeviceAttachmentSpec& deviceAttachmentSpec,
+		const std::shared_ptr<device::DeviceAttachmentSpec>
+			&deviceAttachmentSpec,
 		size_t nSlots,
 		const SpMcRingBuffer::InputEngineConstraints& ringBufferConstraints,
 		boost::asio::io_service& ioService)
@@ -70,7 +71,7 @@ public:
 	virtual void start()
 	{
 		std::cout << __func__ << ": Starting stimulus buffer for device "
-			<< deviceAttachmentSpec.deviceSelector << std::endl;
+			<< deviceAttachmentSpec->deviceSelector << std::endl;
 
 		shouldContinue.store(true);
 		scheduleNextTimeout();
@@ -91,7 +92,7 @@ private:
 	void onTimeout(const boost::system::error_code& error);
 
 public:
-	device::DeviceAttachmentSpec deviceAttachmentSpec;
+	std::shared_ptr<device::DeviceAttachmentSpec> deviceAttachmentSpec;
 	std::vector<StimFrame> frames_;
 
 protected: