fix Mac OSX build

Demos/Benchmarks/BenchmarkDemo.cpp

@@ -1257,7 +1257,7 @@ btRigidBody*	DemoApplication::localCreateRigidBody(float mass, const btTransform
 
 	btRigidBody* body = new btRigidBody(mass,0,shape,localInertia);	
 	body->setWorldTransform(startTransform);
-
+	body->setContactProcessingThreshold(m_defaultContactProcessingThreshold);
 	m_dynamicsWorld->addRigidBody(body);
 
 	return body;

Demos/Benchmarks/BenchmarkDemo.h

@@ -40,7 +40,13 @@ class DemoApplication
 protected:
 
 	btDynamicsWorld* m_dynamicsWorld;
+	btScalar	m_defaultContactProcessingThreshold;
+
 public:
+	DemoApplication()
+	:m_defaultContactProcessingThreshold(BT_LARGE_FLOAT)
+	{
+	}
 	virtual void myinit() {}
 	virtual btDynamicsWorld* getDynamicsWorld()
 	{

Demos/Benchmarks/main.cpp

@@ -51,7 +51,9 @@ int main(int argc,char** argv)
 	benchmarkDemo.initPhysics();
 	benchmarkDemo.getDynamicsWorld()->setDebugDrawer(&gDebugDrawer);
 	benchmarkDemo.setDebugMode(benchmarkDemo.getDebugMode() | btIDebugDraw::DBG_NoDeactivation);
+	setDefaultContactProcessingThreshold(0.f);
 	return glutmain(argc, argv,640,480,"Bullet Physics Demo. http://bulletphysics.com",&benchmarkDemo);
+
 #else //USE_GRAPHICAL_BENCHMARK
 	int d;