Fix compiler warnings

Filters/Core/vtkConnectivityFilter.cxx

@@ -353,8 +353,6 @@ int vtkConnectivityFilter::RequestData(
   // if coloring regions; send down new scalar data
   if ( this->ColorRegions )
   {
-    auto pointRegionIds = vtkIdTypeArray::SafeDownCast(outputPD->GetArray("RegionId"));
-    auto cellRegionIds = vtkIdTypeArray::SafeDownCast(outputCD->GetArray("RegionId"));
     this->OrderRegionIds(this->NewScalars, this->NewCellScalars);
 
     int idx = outputPD->AddArray(this->NewScalars);

Filters/ParallelGeometry/Testing/Cxx/ParallelConnectivity.cxx

@@ -122,7 +122,8 @@ int RunParallelConnectivity(const char* fname, vtkAlgorithm::DesiredOutputPrecis
 
   // Sum up region counts across processes
   std::vector<vtkIdType> globalRegionCounts(regionCounts.size(), 0);
-  contr->AllReduce(regionCounts.data(), globalRegionCounts.data(), regionCounts.size(), vtkCommunicator::SUM_OP);
+  contr->AllReduce(regionCounts.data(), globalRegionCounts.data(),
+    static_cast<vtkIdType>(regionCounts.size()), vtkCommunicator::SUM_OP);
   if (me == 0)
   {
     bool printCounts = false;
@@ -159,7 +160,8 @@ int RunParallelConnectivity(const char* fname, vtkAlgorithm::DesiredOutputPrecis
 
   // Sum up region counts across processes
   globalRegionCounts = std::vector<vtkIdType>(regionCounts.size(), 0);
-  contr->AllReduce(regionCounts.data(), globalRegionCounts.data(), regionCounts.size(), vtkCommunicator::SUM_OP);
+  contr->AllReduce(regionCounts.data(), globalRegionCounts.data(),
+    static_cast<vtkIdType>(regionCounts.size()), vtkCommunicator::SUM_OP);
   if (me == 0)
   {
     bool printCounts = false;