Fixed LWO2 ReaderWriter problem which was down to an the compiler reodering

the evaluation of a Vec3 paramter.

src/osgUtil/Optimizer.cpp

@@ -22,6 +22,8 @@ using namespace osgUtil;
 void Optimizer::optimize(osg::Node* node, unsigned int options)
 {
 
+    return;
+
     if (options & COMBINE_ADJACENT_LODS)
     {
         CombineLODsVisitor clv;