Compiler error concerning ITK_THREAD_RETURN_VALUE

There seems to be a compiler error involving the `ITK_THREAD_RETURN_VALUE` define:
```
Error C2065 'ITK_THREAD_RETURN_VALUE': undeclared identifier itkCannyEdgeDetectionImageFilter2
\lesionsizingtoolkit\include\itkCannyEdgeDetectionRecursiveGaussianImageFilter.hxx 305
```

@dzenanz could you please cast some light on this?

Also missing to use the `ProgressTransformer` class instead of `ProgressReporter`.

Start in itkCannyEdgeDetectionRecursiveGaussianImageFilter.hxx around line 305 and inspect how ITK_THREAD_RETURN_VALUE is referenced. Also trace the ProgressReporter usage mentioned in the issue and compare it with ProgressTransformer; done means the affected code compiles without the reported error and uses the intended progress class.

Rédigé par le modèle d'indexation à partir du texte de l'issue.