more work on serialization, initial for btTriangleMeshShape/btBvhTriangleMeshShape (only for floating point vertices, integer indices) work-in-progress

src/BulletCollision/CollisionShapes/btStridingMeshInterface.h

@@ -106,7 +106,7 @@ struct	btMeshPartData
 {
 	btVector3Data			*m_vertices;
 	btIntIndexData			*m_indices;
-	int                     m_numTriangles;
+	int                     m_numTriangles;//length of m_indices = 3*m_numTriangles
 	int                     m_numVertices;
 };
 
@@ -118,6 +118,8 @@ struct	btStridingMeshInterfaceData
 
 	btVector3Data	m_scaling;
 
+	char m_padding[4];
+
 };