cleaned up, removed warning under MSVC2005 (Level 4)

Mostly related to alignment and unused variables

src/BulletCollision/CollisionDispatch/btCollisionDispatcher.cpp

@@ -42,6 +42,7 @@ m_compoundCreateFunc(0),
 m_swappedCompoundCreateFunc(0),
 m_emptyCreateFunc(0)
 {
+	(void)noDefaultAlgorithms;
 	int i;
 
 	setNearCallback(defaultNearCallback);
@@ -294,6 +295,16 @@ public:
 	{
 	}
 
+	btCollisionPairCallback& operator=(btCollisionPairCallback& other)
+	{
+		m_dispatchInfo = other.m_dispatchInfo;
+		m_dispatcher = other.m_dispatcher;
+		return *this;
+	}
+
+	virtual ~btCollisionPairCallback() {}
+
+
 	virtual bool	processOverlap(btBroadphasePair& pair)
 	{
 		(*m_dispatcher->getNearCallback())(pair,*m_dispatcher,m_dispatchInfo);