ceph: set next_offset on readdir finish

Set next_offset to 2 (always 2!), not 0, on readdir finish.
Signed-off-by: Sage Weil <sage@newdream.net>

fs/ceph/dir.c

@@ -338,7 +338,7 @@ static int ceph_readdir(struct file *filp, void *dirent, filldir_t filldir)
 		if (req->r_reply_info.dir_end) {
 			kfree(fi->last_name);
 			fi->last_name = NULL;
-			fi->next_offset = 0;
+			fi->next_offset = 2;
 		} else {
 			rinfo = &req->r_reply_info;
 			err = note_last_dentry(fi,