Be consistent with which mesh is kept

Composite use mesh from first Timestep. Do the same for non-composite.

Filters/Hybrid/Testing/Cxx/TestTemporalArrayOperatorFilter.cxx

@@ -96,7 +96,7 @@ int TestTemporalArrayOperatorFilter(int, char*[])
 
   double range[2];
   diff->GetPointData()->GetArray("timeData")->GetRange(range);
-  if (range[0] != 0 && range[1] != 20)
+  if (range[0] != 3 && range[1] != 83)
   {
     std::cerr << "Bad initial range:" << range[0] << ";" << range[1] << endl;
     return EXIT_FAILURE;

Filters/Hybrid/vtkTemporalArrayOperatorFilter.cxx

@@ -275,7 +275,7 @@ vtkDataObject* vtkTemporalArrayOperatorFilter::ProcessDataObject(
 
   // Copy input structure into output
   vtkDataObject* outputDataObject = inputData0->NewInstance();
-  outputDataObject->ShallowCopy(inputData1);
+  outputDataObject->ShallowCopy(inputData0);
 
   vtkSmartPointer<vtkDataArray> outputArray;
   outputArray.TakeReference(this->ProcessDataArray(inputArray0, inputArray1));

Filters/Hybrid/vtkTemporalArrayOperatorFilter.h

@@ -6,6 +6,7 @@
  *
  * This filter computes a simple operation between two time steps of one
  * data array.
+ * The mesh of the first time step is used.
  *
  * @sa
  * vtkArrayCalulator