ceph: fix msgpool reservation leak

Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net>
diff --git a/fs/ceph/osd_client.h b/fs/ceph/osd_client.h
index 20ee618..2e4cfd1 100644
--- a/fs/ceph/osd_client.h
+++ b/fs/ceph/osd_client.h
@@ -48,6 +48,7 @@
 	int               r_flags;     /* any additional flags for the osd */
 	u32               r_sent;      /* >0 if r_request is sending/sent */
 	int r_prepared_pages, r_got_reply;
+	int		  r_num_prealloc_reply;
 
 	struct ceph_osd_client *r_osdc;
 	struct kref       r_kref;