libglusterfs: fix SuperFastHash function used in dicitionaries in fact it always returned the value of second parameter (len) as a result.
libglusterfs: fix SuperFastHash function used in dicitionaries in fact it always returned the value of second parameter (len) as a result.

Signed-off-by: Anand V. Avati <avati@dev.gluster.com>

BUG: 155 (The SuperFastHash function used in dictionaries is broken.)
URL: http://bugs.gluster.com/cgi-bin/bugzilla3/show_bug.cgi?id=155

Kaushikbv/Gluster,Kaushikbv/Gluster,Kaushikbv/Gluster