Bounds computed by vtkFreeTypeTools::GetBoundingBox() not quite correct

This issue was created automatically from an original Mantis Issue. Further discussion may take place here.

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See attached screen shot.

The bounds around the text appear to be reasonable in the top half of the image, but shifts down one pixel the bottom half of the image.

I don't yet have a VTK test to demonstrate this. The image was created in ParaView.