Add '.' and '..' entries to be returned by readdir of htree directories

This patch from Chris Li adds '.' and '..' to the rbtree so that they 
are properly returned by readdir.

fs/ext3/namei.c

@@ -549,6 +549,15 @@ int ext3_htree_fill_tree(struct file *dir_file, __u32 start_hash,
 	if (!frame)
 		return err;
 
+	/* Add '.' and '..' from the htree header */
+	if (!start_hash && !start_minor_hash) {
+		de = (struct ext3_dir_entry_2 *) frames[0].bh->b_data;
+		ext3_htree_store_dirent(dir_file, 0, 0, de);
+		de = ext3_next_entry(de);
+		ext3_htree_store_dirent(dir_file, 0, 0, de);
+		count += 2;
+	}
+
 	while (1) {
 		block = dx_get_block(frame->at);
 		dxtrace(printk("Reading block %d\n", block));