Mrntt: Re-add exceptionInd

This now ensures that finalizeReq is indeed called from mrntt,
since exception-experiencing threads will post an exceptionInd
to mrntt, which will then call finalizeReq.

smocore/componentThread.cpp

@@ -106,9 +106,7 @@ void MindThread::main(MindThread& self)
 
 		if (sendExceptionInd)
 		{
-			mrntt::mrntt.finalizeReq(
-				{nullptr, std::bind(
-				&mrntt::marionetteFinalizeReqCb, std::placeholders::_1)});
+			mrntt::mrntt.exceptionInd();
 		}
 	}