[NETFILTER]: Fix ipchains oops in NAT

We updated ip_nat_setup_info to set the initialized flag and call
place_in_hashes, but *didn't* change the call in ip_fw_compat_masq.c
which also calls place_in_hashes() itself (again!).  Result: corrupt
list, and next thing which lands in the same hash bucket goes boom.

Thanks to Andy Polyakov for chasing this down.

net/ipv4/netfilter/ip_fw_compat_masq.c

@@ -91,9 +91,6 @@ do_masquerade(struct sk_buff **pskb, const struct net_device *dev)
 			WRITE_UNLOCK(&ip_nat_lock);
 			return ret;
 		}
-
-		place_in_hashes(ct, info);
-		info->initialized = 1;
 	} else
 		DEBUGP("Masquerading already done on this conn.\n");
 	WRITE_UNLOCK(&ip_nat_lock);