adding function processFractions()

to reduce the length of the function updatePrimaryVariablesNewton()

opm/autodiff/StandardWell.hpp

@@ -328,6 +328,9 @@ namespace Opm
         void updateWellStateFromPrimaryVariables(WellState& well_state) const;
 
         void assembleControlEq();
+
+        // handle the non reasonable fractions due to numerical overshoot
+        void processFractions() const;
     };
 
 }