vfs: spread struct mount mnt_set_mountpoint child argument

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/pnode.c b/fs/pnode.c
index 5d79f38..89ea50d 100644
--- a/fs/pnode.c
+++ b/fs/pnode.c
@@ -246,7 +246,7 @@
 		}
 
 		if (is_subdir(dest_dentry, m->mnt_root)) {
-			mnt_set_mountpoint(m, dest_dentry, &child->mnt);
+			mnt_set_mountpoint(m, dest_dentry, child);
 			list_add_tail(&child->mnt_hash, tree_list);
 		} else {
 			/*