libceph: properly release STAT request's raw_data_in

Signed-off-by: Yan, Zheng <zyan@redhat.com>
Reviewed-by: Alex Elder <elder@linaro.org>
diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index c4ec923..72459b9 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -296,6 +296,9 @@
 	case CEPH_OSD_OP_CMPXATTR:
 		ceph_osd_data_release(&op->xattr.osd_data);
 		break;
+	case CEPH_OSD_OP_STAT:
+		ceph_osd_data_release(&op->raw_data_in);
+		break;
 	default:
 		break;
 	}