Hi,

The "low_part * mult" multiplication of the old function may overflow a
32bits integer...

This patch both fix the overflow issue (tested with frequencies up to
20Ghz), and make the result of the function lose less precision.

Please apply, 

-- 
Yoann Vandoorselaere, http://www.prelude-ids.org

"Programming is a race between programmers, who try and make more and 
 more idiot-proof software, and universe, which produces more and more 
 remarkable idiots. Until now, universe leads the race"  -- R. Cook