[GFS2] Fix typo in rename of directories

A typo caused us to pass a NULL pointer when renaming directories. It
was accidentally introduced in: [GFS2] Clean up inode number handling

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/ops_inode.c b/fs/gfs2/ops_inode.c
index 9cc07f4..84051b9 100644
--- a/fs/gfs2/ops_inode.c
+++ b/fs/gfs2/ops_inode.c
@@ -749,7 +749,7 @@
 		if (error)
 			goto out_end_trans;
 
-		error = gfs2_dir_mvino(ip, &name, nip, DT_DIR);
+		error = gfs2_dir_mvino(ip, &name, ndip, DT_DIR);
 		if (error)
 			goto out_end_trans;
 	} else {