[Insight-users] fixing itk 3.20.1 to compile for gcc 4.7 with ITK_USE_REVIEW_STATISTICS

[Vladimir S. FONOV]

Hello Everybody,

I came across an issue in compiling ITK 3.20.1 with gcc 4.7 when 
ITK_USE_REVIEW_STATISTICS:BOOL=ON ( I was using release-3.20 branch from 
git).
Since it's not currently possible to use gerrit to submit patches for 
3.20 I am sending patch here.

-- 
Best regards,

  Vladimir S. FONOV ~ vladimir.fonov <at> gmail.com