First, move the relevant component to the beginning RenderSetup
instead of Render.  This allows it to be shared instead of
duplicated in the IceT code path.  Secondly, don't invalidate the
cache twice; we still force it to be calculated at the end of
RenderSetup, but if it so happens that it was calculated during
setup, it's OK (and much faster) to use the cached value.

git-svn-id: http://visit.ilight.com/svn/visit/trunk/src@7849 18c085ea-50e0-402c-830e-de6fd14e8384