off by one bug in slurpd

["Pierangelo Masarati" <masarati@aero.polimi.it>]

Kurt, 

I found an off-by-one bug (which was triggered by enabling log,
like in test-007) that is also present in 2.0 releng; I found
it while backporting ITS#1335.  What if I fix it in releng as well? 

Ando. 

Dr. Pierangelo Masarati               | voice: +39 02 2399 8309
Dip. Ing. Aerospaziale                | fax:   +39 02 2399 8334
Politecnico di Milano                 | mailto:pierangelo.masarati@polimi.it
via La Masa 34, 20156 Milano, Italy   | http://www.aero.polimi.it/~masarati