only update aabb of active objects, thanks Peter Tchernev for reporting (http://bulletphysics.com/Bullet/phpBB3/viewtopic.php?f=9&t=1764 )

move debug aabb rendering from updateAabb to debugDrawWorld

Demos/GimpactTestDemo/GimpactTestDemo.cpp

@@ -598,6 +598,10 @@ void GimpactConcaveDemo::clientMoveAndDisplay()
 
 	m_clock.reset();
 	m_dynamicsWorld->stepSimulation(dt);
+
+	//optional but useful: debug drawing
+	m_dynamicsWorld->debugDrawWorld();
+
 	m_steps_done++;
 
 	//m_dynamicsWorld->stepSimulation(dts);