fix a potential data race condition.

remove createObstacleCourse programmatic creation part until we can steam vertices/indices.

examples/SharedMemory/PhysicsServerExample.cpp

@@ -1764,8 +1764,9 @@ void PhysicsServerExample::initPhysics()
 		}
 	}
 
+	m_args[0].m_cs->lock();
 	m_args[0].m_cs->setSharedParam(1, eGUIHelperIdle);
-
+	m_args[0].m_cs->unlock();
 	m_args[0].m_cs2->lock();
 
 	{