NFS: nfs_readdir_filler catch all errors

Check for all errors, not a specific one.
Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/dir.c

@@ -556,7 +556,7 @@ int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page* page)
 {
 	struct inode	*inode = desc->file->f_path.dentry->d_inode;
 
-	if (nfs_readdir_xdr_to_array(desc, page, inode) == -1)
+	if (nfs_readdir_xdr_to_array(desc, page, inode) < 0)
 		goto error;
 	SetPageUptodate(page);