This fixes a number of things that are warnings in the Mac compiler....

core/cross/bounding_box.h

 /*
  * Copyright 2009, Google Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 32 matching lines @@
 #include "core/cross/param.h"
 
 namespace o3d {
 
 class RayIntersectionInfo;
 
 // Defines a class that represents an Axis Aligned Bounding Box.
 class BoundingBox {
  public:
   // Constructs an uninitialized BoundingBox marking it as non valid.
-  BoundingBox()  : min_extent_(0, 0, 0), max_extent_(0, 0, 0), valid_(false) { }
+  BoundingBox()  : valid_(false), min_extent_(0, 0, 0), max_extent_(0, 0, 0) { }
 
   // Constructs a BoundingBox.
   // Parameters:
   //   min_extent: minimum corner of the box.
   //   max_extent: maximum corner of the box.
   BoundingBox(const Point3& min_extent, const Point3& max_extent)
       : valid_(true),
         min_extent_(Vectormath::Aos::minPerElem(min_extent, max_extent)),
         max_extent_(Vectormath::Aos::maxPerElem(min_extent, max_extent)) {
   }
@@ skipping 109 matching lines @@
   TypedBindConnection<ParamBoundingBox>* destination_bind_connection_;
 
   O3D_DECL_CLASS(ParamBindFloat3sToBoundingBox, ParamBind)
   DISALLOW_COPY_AND_ASSIGN(ParamBindFloat3sToBoundingBox);
 };
 #endif
 
 }  // namespace o3d
 
 #endif  // O3D_CORE_CROSS_BOUNDING_BOX_H_