Delete a possibly armed timer before kfree'ing the connection object.

Solves: http://lkml.org/lkml/2008/2/15/514Reported-by: NQuel Qun <kelk1@comcast.net>
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>