This changes the output by (stddev:    0.21 PSNR:109.51, file:ddinterview28.ra),
the changes are due to float rounding inaccuracies and do not happen if doubles
are used.


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@15394 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b