STYLE: Replace Fill w/ auto var = itk::MakeFilled in MeshIOTestHelper

Replaced code of the form

    T var;
    var.Fill(x);

with `auto var = itk::MakeFilled<T>(x);`

- Follow-up to pull request InsightSoftwareConsortium#4891
"STYLE: Replace Fill calls with `auto var = itk::MakeFilled<T>` in tests"

Modules/IO/MeshBase/include/itkMeshIOTestHelper.h

@@ -96,8 +96,7 @@ TestBaseClassMethodsMeshIO(typename TMeshIO::Pointer meshIO)
 
   using RGBAPixelType = itk::RGBAPixel<FloatType>;
 
-  RGBAPixelType rgbaValue;
-  rgbaValue.Fill(1.0);
+  auto rgbaValue = itk::MakeFilled<RGBAPixelType>(1.0);
   usePointPixel = true;
   meshIO->SetPixelType(rgbaValue, usePointPixel);
   LOCAL_ITK_TEST_SET_GET_VALUE(4, meshIO->GetNumberOfPointPixelComponents());
@@ -116,8 +115,7 @@ TestBaseClassMethodsMeshIO(typename TMeshIO::Pointer meshIO)
   const itk::SizeValueType length = 5;
   using VectorPixelType = itk::Vector<FloatType, length>;
 
-  VectorPixelType vectorValue;
-  vectorValue.Fill(1.0);
+  auto vectorValue = itk::MakeFilled<VectorPixelType>(1.0);
   usePointPixel = true;
   meshIO->SetPixelType(vectorValue, usePointPixel);
   LOCAL_ITK_TEST_SET_GET_VALUE(length, meshIO->GetNumberOfPointPixelComponents());
@@ -135,8 +133,7 @@ TestBaseClassMethodsMeshIO(typename TMeshIO::Pointer meshIO)
 
   using CovariantVectorPixelType = itk::CovariantVector<FloatType, length>;
 
-  CovariantVectorPixelType covariantVectorValue;
-  covariantVectorValue.Fill(1.0);
+  auto covariantVectorValue = itk::MakeFilled<CovariantVectorPixelType>(1.0);
   usePointPixel = true;
   meshIO->SetPixelType(covariantVectorValue, usePointPixel);
   LOCAL_ITK_TEST_SET_GET_VALUE(length, meshIO->GetNumberOfPointPixelComponents());
@@ -154,8 +151,7 @@ TestBaseClassMethodsMeshIO(typename TMeshIO::Pointer meshIO)
 
   using FixedArrayPixelType = itk::FixedArray<FloatType, length>;
 
-  FixedArrayPixelType fixedArrayValue;
-  fixedArrayValue.Fill(1.0);
+  auto fixedArrayValue = itk::MakeFilled<FixedArrayPixelType>(1.0);
   usePointPixel = true;
   meshIO->SetPixelType(fixedArrayValue, usePointPixel);
   LOCAL_ITK_TEST_SET_GET_VALUE(length, meshIO->GetNumberOfPointPixelComponents());
@@ -173,8 +169,7 @@ TestBaseClassMethodsMeshIO(typename TMeshIO::Pointer meshIO)
 
   using SymmetricSecondRankTensorPixelType = itk::SymmetricSecondRankTensor<FloatType, length>;
 
-  SymmetricSecondRankTensorPixelType symmetricSecondRankTensorValue;
-  symmetricSecondRankTensorValue.Fill(1.0);
+  auto symmetricSecondRankTensorValue = itk::MakeFilled<SymmetricSecondRankTensorPixelType>(1.0);
   usePointPixel = true;
   meshIO->SetPixelType(symmetricSecondRankTensorValue, usePointPixel);
   LOCAL_ITK_TEST_SET_GET_VALUE(length * (length + 1) / 2, meshIO->GetNumberOfPointPixelComponents());
@@ -192,8 +187,7 @@ TestBaseClassMethodsMeshIO(typename TMeshIO::Pointer meshIO)
 
   using DiffusionTensor3DPixelType = itk::DiffusionTensor3D<FloatType>;
 
-  DiffusionTensor3DPixelType diffusionTensor3DPixelValue;
-  diffusionTensor3DPixelValue.Fill(1.0);
+  auto diffusionTensor3DPixelValue = itk::MakeFilled<DiffusionTensor3DPixelType>(1.0);
   usePointPixel = true;
   meshIO->SetPixelType(diffusionTensor3DPixelValue, usePointPixel);
   LOCAL_ITK_TEST_SET_GET_VALUE(6, meshIO->GetNumberOfPointPixelComponents());
@@ -213,8 +207,7 @@ TestBaseClassMethodsMeshIO(typename TMeshIO::Pointer meshIO)
   const itk::SizeValueType cols = 2;
   using MatrixPixelType = itk::Matrix<FloatType, rows, cols>;
 
-  MatrixPixelType matrixPixelValue;
-  matrixPixelValue.Fill(1.0);
+  auto matrixPixelValue = itk::MakeFilled<MatrixPixelType>(1.0);
   usePointPixel = true;
   meshIO->SetPixelType(matrixPixelValue, usePointPixel);
   LOCAL_ITK_TEST_SET_GET_VALUE(rows * cols, meshIO->GetNumberOfPointPixelComponents());