tabulated component: make it use some brains again

it seems that the issue which triggered to make the tabulation "dumb"
was not related to the tabulation. I guess that it had something to do
with the fact that I used -ffast-math without -fno-finite-math-only...

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@7327 2fb0f335-1f38-0410-981e-8018bf24f1b0