[IPV4]: Get rid of bogus __in_put_dev in pktgen

This patch gets rid of a bogus __in_dev_put() in pktgen.c.  This was
spotted by Suzanne Wood.
Signed-off-by: NHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/core/pktgen.c

@@ -1673,7 +1673,6 @@ static void pktgen_setup_inject(struct pktgen_dev *pkt_dev)
 					pkt_dev->saddr_min = in_dev->ifa_list->ifa_address;
 					pkt_dev->saddr_max = pkt_dev->saddr_min;
 				}
-				__in_dev_put(in_dev);	
 			}
 			rcu_read_unlock();
 		}