version 1.29 from
http://sourceforge.net/projects/kissfft/

didnt touch the files at all, except for default double change in kiss_fft.h,
tools folder simply merged into main folder, to make include semantic right.
kiss_fastfir.c:76 from float to
    kiss_fft_scalar scale;

wiki:
http://sourceforge.net/apps/mediawiki/kissfft/index.php?title=Main_Page