Mind: Use state variables to manage shutdown

We now allow the shutdown*Req() methods of Mind:: to return early
if their aspect of the object in question hasn't actually been
initialized.

smocore/marionette/marionette.cpp

@@ -218,7 +218,6 @@ void ComponentThread::marionetteMain(ComponentThread& self)
 	if (callShutdownSalmanoff) {
 		shutdownSalmanoff();
 	}
-
 }
 
 } // namespace smo