From Colin McDonald, "rc/osgUtl/MeshOptimizers.cpp won't compile on some systems due to a missing std:: namespace prefix."

git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14876 16af8721-9629-0410-8352-f15c8da7e697

src/osgUtil/MeshOptimizers.cpp

@@ -815,7 +815,7 @@ void VertexCacheVisitor::doVertexOptimization(Geometry& geom,
             // vertices in the cache have already been added.
             OSG_DEBUG << "VertexCacheVisitor searching all triangles" << std::endl;
             TriangleList::iterator maxItr
-                = max_element(triangles.begin(), triangles.end(),
+                = std::max_element(triangles.begin(), triangles.end(),
                               CompareTriangle());
             triToAdd = &(*maxItr);
         }