[ITK-dev] include file header double underscore

[Simon Warfield]

Did itk include file ifndef lines lose their double underscore at some 
point?
Was there a reason for that ?  It has an impact on backwards compatibility.

http://www.itk.org/Doxygen47/html/itkAbsImageFilter_8h_source.html
line 18 :
#ifndef __itkAbsImageFilter_h

http://www.itk.org/Doxygen48/html/itkAbsImageFilter_8h_source.html
line 18 :
#ifndef itkAbsImageFilter_h


--Simon