[1p] Use correct volVars

dumux/porousmediumflow/1p/implicit/volumevariables.hh

@@ -25,7 +25,7 @@
 #define DUMUX_1P_VOLUME_VARIABLES_HH
 
 #include <dumux/common/properties.hh>
-#include <dumux/discretization/volumevariables.hh>
+#include <dumux/porousmediumflow/volumevariables.hh>
 #include <dumux/material/fluidstates/immiscible.hh>
 
 namespace Dumux
@@ -33,14 +33,14 @@ namespace Dumux
 
 /*!
  * \ingroup OnePModel
- * \ingroup ImplicitVolumeVariables
+ * \ingroup PorousMediumFlowVolumeVariables
  * \brief Contains the quantities which are constant within a
  *        finite volume in the one-phase model.
  */
 template <class TypeTag>
-class OnePVolumeVariables : public ImplicitVolumeVariables<TypeTag>
+class OnePVolumeVariables : public PorousMediumFlowVolumeVariables<TypeTag>
 {
-    using ParentType = ImplicitVolumeVariables<TypeTag>;
+    using ParentType = PorousMediumFlowVolumeVariables<TypeTag>;
     using Implementation = typename GET_PROP_TYPE(TypeTag, VolumeVariables);
     using Scalar = typename GET_PROP_TYPE(TypeTag, Scalar);
     using Problem = typename GET_PROP_TYPE(TypeTag, Problem);