moved some declarations together with initial assignments.

Doesn't fix any warning or problem, just saw these while I was addressing some nearby clang analyzer warnings.

Change-Id: Ic4638fb4b865a52cdca52611039a5fde9cb5be8f

Filters/General/vtkImageMarchingCubes.cxx

@@ -505,7 +505,6 @@ void vtkImageMarchingCubesHandleCube(vtkImageMarchingCubes *self,
   int cubeIndex, ii;
   vtkIdType pointIds[3];
   vtkMarchingCubesTriangleCases *triCase, *triCases;
-  EDGE_LIST  *edge;
 
   vtkInformation *inInfo = self->GetExecutive()->GetInputInformation(0, 0);
 
@@ -554,7 +553,7 @@ void vtkImageMarchingCubesHandleCube(vtkImageMarchingCubes *self,
       {
       // Get edges.
       triCase = triCases + cubeIndex;
-      edge = triCase->edges;
+      EDGE_LIST *edge = triCase->edges;
       // loop over triangles
       while(*edge > -1)
         {

Filters/General/vtkIntersectionPolyDataFilter.cxx

@@ -268,7 +268,6 @@ int vtkIntersectionPolyDataFilter::Impl
   vtkCellData *inCD  = input->GetCellData();
   vtkCellData *outCD = output->GetCellData();
   vtkIdType numCells = input->GetNumberOfCells();
-  vtkIdType newId;
   vtkIdType cellIdX = 0;
 
   //
@@ -330,7 +329,7 @@ int vtkIntersectionPolyDataFilter::Impl
   if ( input->GetPolys()->GetNumberOfCells() > 0 )
     {
     vtkCellArray *cells = input->GetPolys();
-    newId = output->GetNumberOfCells();
+    vtkIdType newId = output->GetNumberOfCells();
 
     vtkSmartPointer< vtkCellArray > newPolys =
       vtkSmartPointer< vtkCellArray >::New();

Filters/Geometry/vtkStructuredGridGeometryFilter.cxx

@@ -449,26 +449,22 @@ int vtkStructuredGridGeometryFilter::RequestUpdateExtent(
   vtkInformation *inInfo = inputVector[0]->GetInformationObject(0);
   vtkInformation *outInfo = outputVector->GetInformationObject(0);
 
-  int piece, numPieces;
-  int *wholeExt;
-  int ext[6];
-  vtkExtentTranslator *translator;
-
-  translator = vtkExtentTranslator::SafeDownCast(
+  vtkExtentTranslator *translator = vtkExtentTranslator::SafeDownCast(
     inInfo->Get(vtkStreamingDemandDrivenPipeline::EXTENT_TRANSLATOR()));
-  wholeExt =
+  int *wholeExt =
     inInfo->Get(vtkStreamingDemandDrivenPipeline::WHOLE_EXTENT());
 
   // Copy whole extent only if present
+  int ext[6];
   if ( wholeExt )
     {
     memcpy( ext, wholeExt, 6 * sizeof( int ) );
     }
 
   // Get request from output information
-  piece =
+  int piece =
     outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_PIECE_NUMBER());
-  numPieces =
+  int numPieces =
     outInfo->Get(vtkStreamingDemandDrivenPipeline::UPDATE_NUMBER_OF_PIECES());
 
   // get the extent associated with the piece.