[gdal-dev] GDALSimpleSURF improvements

[Seth Price]

I've worked the FLANN library into GDALSimpleSURF for a massive speedup
and made some other minor speed improvements mainly related to setting
constants as the right type and moving invariants outside of loops.

You can grab the updated source here. Please add it to whatever repository
is appropriate.
http://seth1.bluezone.usu.edu/flann_surf.tgz

Thanks,
Seth