[PATCH] kfree calls cleanup

[Benoît Dejean]

i've removed some useless test for NULL pointer before kfree calls.
if(p) kfree(p) -> kfree(p)
i've also removed variables that have become unused.
the patch is quite big, but i've check it many times.
-- 
BenoÃt Dejean
JID: TazForEver@xxxxxxxxxx
http://gdesklets.gnomedesktop.org
http://www.paulla.asso.fr

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