the saturation argument for the initSomething class was an int instead
of a Scalar. probably nobody noticed so far because the saturation was
always initialized to 1.0 in the decoupled tests

git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@5148 2fb0f335-1f38-0410-981e-8018bf24f1b0