libceph: minor byte order problems in read_partial_message()

Some values printed are not (necessarily) in CPU order.  We already
have a copy of the converted versions, so use them.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index b8d0da5..d9ace97 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -1916,7 +1916,7 @@
 		int skip = 0;
 
 		dout("got hdr type %d front %d data %d\n", con->in_hdr.type,
-		     con->in_hdr.front_len, con->in_hdr.data_len);
+		     front_len, data_len);
 		ret = ceph_con_in_msg_alloc(con, &skip);
 		if (ret < 0)
 			return ret;