removed some warnings, as reported here:

http://code.google.com/p/bullet/issues/detail?id=123
Thanks sparkprime

src/BulletCollision/CollisionDispatch/btConvexConcaveCollisionAlgorithm.cpp

@@ -72,7 +72,7 @@ btConvexTriangleCallback::~btConvexTriangleCallback()
 void	btConvexTriangleCallback::clearCache()
 {
 	m_dispatcher->clearManifold(m_manifoldPtr);
-};
+}