introduced the affine shift again, old segfault appears again, so there still...

introduced the affine shift again, old segfault appears again, so there still has to be some copy/reference/whatever problem

git-svn-id: https://dune.mathematik.uni-freiburg.de/svn/dune-fem-functionals/trunk@216 4028485c-44d9-4cde-a312-5a4635ee2db9