math/fftw3 distinfo incorrect

[Jonathan Chen]

Hi,

The latest bump to math/fftw3 from 3.2 to 3.2.1 missed the distinfo
changes, which still references fftw-3.2.tar.gz.

Cheers.
-- 
Jonathan Chen <jonc at chen.org.nz>
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                 When you don't know what you are doing, do it neatly.