COMP: Suppress unused variable warning

This example code is useful for representing how to use
the code, even though the variable set is not used.

Suppress the unused variable warning.

Author: hjmjohnson

src/Core/Common/ReturnObjectFromFunction/Code.cxx

@@ -59,6 +59,7 @@ main()
 
   {
     ImageType * pointer = ReturnPointer();
+    (void)pointer;
     // This crashes the program because the smart pointer created in the function goes out of scope and gets deleted
     // because it is returned as a normal pointer.
     // std::cout << pointer->GetLargestPossibleRegion() << std::endl;
@@ -67,6 +68,7 @@ main()
 
   {
     ImageType * pointer = ReturnSmartPointer();
+    (void)pointer;
     // This crashes the program because though the function returned a ::Pointer, it was not stored
     // anywhere so the reference count was not increased, so it got deleted.
     // std::cout << pointer->GetLargestPossibleRegion() << std::endl;

src/Core/Mesh/AccessDataInCells/Code.cxx

@@ -75,7 +75,8 @@ main(int, char *[])
 
   while (cellDataIterator != end)
   {
-    PixelType cellValue = cellDataIterator.Value();
+    const PixelType cellValue = cellDataIterator.Value();
+    (void)cellValue; // Avoid unused variable warning for this example code
     // std::cout << cellValue << std::endl; //same values as before
     ++cellDataIterator;
   }