make soft bodies more compatible with rigid body API: disable setCollisionShape (it would delete the shape passed in!)

src/BulletCollision/CollisionDispatch/btCollisionObject.h

@@ -143,7 +143,7 @@ public:
 
 	virtual ~btCollisionObject();
 
-	void	setCollisionShape(btCollisionShape* collisionShape)
+	virtual void	setCollisionShape(btCollisionShape* collisionShape)
 	{
 		m_collisionShape = collisionShape;
 		m_rootCollisionShape = collisionShape;

src/BulletSoftBody/btSoftBody.cpp

@@ -69,7 +69,7 @@ btSoftBody::btSoftBody(btSoftBodyWorldInfo*	worldInfo,int node_count,  const btV
 	pm->m_flags	=	fMaterial::Default;
 	/* Collision shape	*/ 
 	///for now, create a collision shape internally
-	setCollisionShape(new btSoftBodyCollisionShape(this));	
+	m_collisionShape = new btSoftBodyCollisionShape(this);
 	m_collisionShape->setMargin(0.25);
 	/* Nodes			*/ 
 	const btScalar		margin=getCollisionShape()->getMargin();

src/BulletSoftBody/btSoftBody.h

@@ -606,6 +606,13 @@ public:
 	/* dtor																	*/ 
 	virtual ~btSoftBody();
 	/* Check for existing link												*/ 
+
+
+	virtual void	setCollisionShape(btCollisionShape* collisionShape)
+	{
+		//don't do anything, due to the internal shape hack: todo: fix this
+	}
+
 	bool				checkLink(	int node0,
 		int node1) const;
 	bool				checkLink(	const Node* node0,

src/BulletSoftBody/btSoftBodyInternals.h

@@ -94,7 +94,6 @@ public:
 	virtual void	setLocalScaling(const btVector3& /*scaling*/)
 	{		
 		///na
-		btAssert(0);
 	}
 	virtual const btVector3& getLocalScaling() const
 	{