one change of SeqILU0 to SeqILU too much

dune/solvers/iterationsteps/istlseqilu0step.hh

@@ -31,7 +31,7 @@ public:
      */
     virtual void preprocess() override {
         if (needReconstruction_) {
-            seqILU0_ = std::make_unique<SeqILU>(*this->mat_, 0, relaxationFactor_);
+            seqILU0_ = std::make_unique<SeqILU0>(*this->mat_, 0, relaxationFactor_);
             needReconstruction_ = false;
         }
         // Note: as of now, pre() is a dummy