bug fixed in dpc_dSw function

   - argument in call for VanGenuchten::dpc_dSw() was Sw instead of Swe



git-svn-id: svn://svn.iws.uni-stuttgart.de/DUMUX/dumux/trunk@4990 2fb0f335-1f38-0410-981e-8018bf24f1b0

dumux/material/fluidmatrixinteractions/2p/regularizedvangenuchten.hh

@@ -182,7 +182,7 @@ public:
             return mHigh_(params);
         }
 
-        return VanGenuchten::dpC_dSw(params, Sw);
+        return VanGenuchten::dpC_dSw(params, Swe);
     }
 
     /*!