Send CaptureThread error into app-local message queue.

firmware/common/message.hpp

@@ -64,6 +64,7 @@ public:
 		SpectrumStreamingConfig = 15,
 		DisplaySleep = 16,
 		CaptureConfig = 17,
+		CaptureThreadError = 18,
 		MAX
 	};
 
@@ -494,4 +495,16 @@ public:
 	CaptureConfig* const config;
 };
 
+class CaptureThreadErrorMessage : public Message {
+public:
+	constexpr CaptureThreadErrorMessage(
+		uint32_t error
+	) : Message { ID::CaptureThreadError },
+		error { error }
+	{
+	}
+
+	uint32_t error;
+};
+
 #endif/*__MESSAGE_H__*/