[newton] Pass current solution to newtonBeginStep

dumux/nonlinear/newtoncontroller.hh

@@ -206,7 +206,7 @@ public:
      * \param u The initial solution
      */
     template<class SolutionVector>
-    void newtonBegin(const SolutionVector &u)
+    void newtonBegin(const SolutionVector& u)
     {
         numSteps_ = 0;
     }
@@ -214,7 +214,8 @@ public:
     /*!
      * \brief Indicates the beginning of a Newton iteration.
      */
-    void newtonBeginStep()
+    template<class SolutionVector>
+    void newtonBeginStep(const SolutionVector& u)
     {
         lastShift_ = shift_;
         if (numSteps_ == 0)

dumux/nonlinear/newtonmethod.hh

@@ -102,7 +102,7 @@ public:
             {
                 // notify the controller that we're about to start
                 // a new timestep
-                controller_->newtonBeginStep();
+                controller_->newtonBeginStep(uCurrentIter);
 
                 // make the current solution to the old one
                 if (controller_->newtonNumSteps() > 0)