Test null for stopping (crash unit test)

src/controllers/mantidreductiontest/ReductionControllerTest.cpp

@@ -55,13 +55,15 @@ ReductionControllerTest::ReductionControllerTest(const ReductionControllerTest&
 
 ReductionControllerTest::~ReductionControllerTest() {
 
-	// Stop the remote application.
-	m_remoteApplication->stop();
+	if (m_remoteApplication.get() != NULL) {
+		// Stop the remote application.
+		m_remoteApplication->stop();
 
-	// Wait for the termination
-	application::State state = m_remoteApplication->waitFor();
+		// Wait for the termination
+		application::State state = m_remoteApplication->waitFor();
 
-	cout << "Remote application " << m_remoteApplication->getName() << " terminated with state " << application::toString(state) << endl;
+		cout << "Remote application " << m_remoteApplication->getName() << " terminated with state " << application::toString(state) << endl;
+	}
 }
 
 void ReductionControllerTest::postConfiguration() {