stop passing nameidata * to ->d_revalidate()

Just the lookup flags.  Die, bastard, die...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index 0d9e23a..40ceb40 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -56,7 +56,7 @@
 	d_set_d_op(dentry, &pid_dentry_operations);
 	d_add(dentry, inode);
 	/* Close the race of the process dying before we return the dentry */
-	if (pid_revalidate(dentry, NULL))
+	if (pid_revalidate(dentry, 0))
 		error = NULL;
 out:
 	return error;