Fix wrong usage of size_t

src/lbm/free_surface/VtkWriter.h

@@ -56,6 +56,7 @@ void addVTKOutput(const std::weak_ptr< StructuredBlockForest >& blockForestPtr,
                   const BlockDataID& forceDensityFieldID, const BlockDataID& curvatureFieldID,
                   const BlockDataID& normalFieldID, const BlockDataID& obstacleNormalFieldID)
 {
+   using value_type = typename FlagField_T::value_type;
    const auto blockForest = blockForestPtr.lock();
    WALBERLA_CHECK_NOT_NULLPTR(blockForest);
 
@@ -98,17 +99,17 @@ void addVTKOutput(const std::weak_ptr< StructuredBlockForest >& blockForestPtr,
 
       // map flagIDs to integer values
       const auto flagMapper =
-         std::make_shared< field::FlagFieldMapping< FlagField_T, walberla::uint_t > >(flagFieldID, "mapped_flag");
-      flagMapper->addMapping(flagIDs::liquidFlagID, uint_c(1));
-      flagMapper->addMapping(flagIDs::interfaceFlagID, uint_c(2));
-      flagMapper->addMapping(flagIDs::gasFlagID, uint_c(3));
-      flagMapper->addMapping(FreeSurfaceBoundaryHandling_T::noSlipFlagID, uint_c(4));
-      flagMapper->addMapping(FreeSurfaceBoundaryHandling_T::freeSlipFlagID, uint_c(6));
-      flagMapper->addMapping(FreeSurfaceBoundaryHandling_T::ubbFlagID, uint_c(6));
-      flagMapper->addMapping(FreeSurfaceBoundaryHandling_T::ubbInflowFlagID, uint_c(7));
-      flagMapper->addMapping(FreeSurfaceBoundaryHandling_T::pressureFlagID, uint_c(8));
-      flagMapper->addMapping(FreeSurfaceBoundaryHandling_T::pressureOutflowFlagID, uint_c(9));
-      flagMapper->addMapping(FreeSurfaceBoundaryHandling_T::outletFlagID, uint_c(10));
+         std::make_shared< field::FlagFieldMapping< FlagField_T, value_type > >(flagFieldID, "mapped_flag");
+      flagMapper->addMapping(flagIDs::liquidFlagID, numeric_cast<value_type>(1));
+      flagMapper->addMapping(flagIDs::interfaceFlagID, numeric_cast<value_type>(2));
+      flagMapper->addMapping(flagIDs::gasFlagID, numeric_cast<value_type>(3));
+      flagMapper->addMapping(FreeSurfaceBoundaryHandling_T::noSlipFlagID, numeric_cast<value_type>(4));
+      flagMapper->addMapping(FreeSurfaceBoundaryHandling_T::freeSlipFlagID, numeric_cast<value_type>(6));
+      flagMapper->addMapping(FreeSurfaceBoundaryHandling_T::ubbFlagID, numeric_cast<value_type>(6));
+      flagMapper->addMapping(FreeSurfaceBoundaryHandling_T::ubbInflowFlagID, numeric_cast<value_type>(7));
+      flagMapper->addMapping(FreeSurfaceBoundaryHandling_T::pressureFlagID, numeric_cast<value_type>(8));
+      flagMapper->addMapping(FreeSurfaceBoundaryHandling_T::pressureOutflowFlagID, numeric_cast<value_type>(9));
+      flagMapper->addMapping(FreeSurfaceBoundaryHandling_T::outletFlagID, numeric_cast<value_type>(10));
 
       writers.push_back(flagMapper);