ceph: Always free allocated memory in osdmap_decode()

Always free memory allocated to 'pi' in
net/ceph/osdmap.c::osdmap_decode().

Signed-off-by: Jesper Juhl <[e-mail]>
Signed-off-by: Sage Weil <[e-mail]>

net/ceph/osdmap.c

···
 			goto bad;
 		}
 		err = __decode_pool(p, end, pi);
-		if (err < 0)
+		if (err < 0) {
+			kfree(pi);
 			goto bad;
+		}
 		__insert_pg_pool(&map->pg_pools, pi);
 	}