Support Serial MIDI

https://github.com/probonopd/MiniDexed/issues/20#issuecomment-1046300598
Thanks @rsta2

src/kernel.cpp

@@ -38,7 +38,10 @@ bool CKernel::Initialize (void)
 		return FALSE;
 	}
 
-	m_Dexed.activate();
+	if (!m_Dexed.Initialize ())
+	{
+		return FALSE;
+	}
 
 	return TRUE;
 }
@@ -47,8 +50,6 @@ CStdlibApp::TShutdownMode CKernel::Run (void)
 {
 	std::cout << "Hello MiniDexed!\n";
 
-	m_Dexed.Start ();
-
 	std::cout << "Loading hardcoded fmpiano_sysex...\n";
 	m_Dexed.loadVoiceParameters(fmpiano_sysex);
         m_Dexed.setTranspose(24);