ntdll: Fix test failure on recent Windows versions.

dlls/ntdll/directory.c

@@ -2349,7 +2349,7 @@ NTSTATUS nt_to_unix_file_name_attr( const OBJECT_ATTRIBUTES *attr, ANSI_STRING *
     name     = attr->ObjectName->Buffer;
     name_len = attr->ObjectName->Length / sizeof(WCHAR);
 
-    if (name_len && IS_SEPARATOR(name[0])) return STATUS_OBJECT_PATH_SYNTAX_BAD;
+    if (name_len && IS_SEPARATOR(name[0])) return STATUS_INVALID_PARAMETER;
 
     /* check for invalid characters */
     for (p = name; p < name + name_len; p++)

dlls/ntdll/tests/file.c

@@ -195,7 +195,7 @@ static void open_file_test(void)
     nameW.Length += sizeof(WCHAR);
     status = pNtOpenFile( &handle, GENERIC_READ, &attr, &io,
                           FILE_SHARE_READ|FILE_SHARE_WRITE, FILE_DIRECTORY_FILE );
-    ok( status == STATUS_OBJECT_PATH_SYNTAX_BAD,
+    ok( status == STATUS_INVALID_PARAMETER || status == STATUS_OBJECT_PATH_SYNTAX_BAD,  /* nt4 */
         "open %s failed %x\n", wine_dbgstr_w(nameW.Buffer), status );
     if (!status) CloseHandle( handle );