zonefs: d_splice_alias() will do the right thing on ERR_PTR() inode

Acked-by: Damien Le Moal <dlemoal@kernel.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/zonefs/super.c

@@ -747,8 +747,6 @@ static struct dentry *zonefs_lookup(struct inode *dir, struct dentry *dentry,
 		inode = zonefs_get_dir_inode(dir, dentry);
 	else
 		inode = zonefs_get_file_inode(dir, dentry);
-	if (IS_ERR(inode))
-		return ERR_CAST(inode);
 
 	return d_splice_alias(inode, dentry);
 }