fix compiler warnings.

vtkm/cont/ArrayHandleCartesianProduct.h

@@ -183,7 +183,6 @@ public:
   {
       vtkm::Id dim1 = this->PortalFirst.GetNumberOfValues();
       vtkm::Id dim2 = this->PortalSecond.GetNumberOfValues();
-      vtkm::Id dim3 = this->PortalThird.GetNumberOfValues();
       vtkm::Id dim12 = dim1*dim2;
       vtkm::Id idx12 = index % dim12;
       vtkm::Id i1 = idx12 % dim1;
@@ -199,7 +198,6 @@ public:
   {
       vtkm::Id dim1 = this->PortalFirst.GetNumberOfValues();
       vtkm::Id dim2 = this->PortalSecond.GetNumberOfValues();
-      vtkm::Id dim3 = this->PortalThird.GetNumberOfValues();
       vtkm::Id dim12 = dim1*dim2;
       vtkm::Id idx12 = index % dim12;
 
@@ -430,7 +428,7 @@ public:
   }
 
   VTKM_CONT_EXPORT
-  void Shrink(vtkm::Id numberOfValues)
+  void Shrink(vtkm::Id /*numberOfValues*/)
   {
       throw vtkm::cont::ErrorControlBadAllocation("Does not make sense.");
   }

vtkm/cont/DataSetBuilderExplicit.h

@@ -117,7 +117,7 @@ DataSetBuilderExplicit::Create(const std::vector<T> &xVals,
     std::vector<CoordType> coords(xVals.size());
     
     vtkm::Id nPts = static_cast<vtkm::Id>(coords.size());
-    for (size_t i=0; i < nPts; i++)
+    for (vtkm::Id i=0; i < nPts; i++)
     {
         coords[i][0] = xVals[i];
         coords[i][1] = yVals[i];
@@ -151,7 +151,7 @@ DataSetBuilderExplicit::Create(const std::vector<T> &xVals,
     std::vector<CoordType> coords(xVals.size());
     
     vtkm::Id nPts = static_cast<vtkm::Id>(coords.size());
-    for (size_t i=0; i < nPts; i++)
+    for (vtkm::Id i=0; i < nPts; i++)
     {
         coords[i][0] = xVals[i];
         coords[i][1] = yVals[i];
@@ -209,7 +209,7 @@ DataSetBuilderExplicit::Create(const std::vector<T> &xVals,
     std::vector<CoordType> coords(xVals.size());
     
     vtkm::Id nPts = static_cast<vtkm::Id>(coords.size());
-    for (size_t i=0; i < nPts; i++)
+    for (vtkm::Id i=0; i < nPts; i++)
     {
         coords[i][0] = xVals[i];
         coords[i][1] = yVals[i];
@@ -246,7 +246,7 @@ DataSetBuilderExplicit::Create(const std::vector<T> &xVals,
     std::vector<CoordType> coords(xVals.size());
     
     vtkm::Id nPts = static_cast<vtkm::Id>(coords.size());
-    for (size_t i=0; i < nPts; i++)
+    for (vtkm::Id i=0; i < nPts; i++)
     {
         coords[i][0] = xVals[i];
         coords[i][1] = yVals[i];