Parentheses around select clause cause parser to fail

```
To reproduce:

- $parser = new PHPSQLParser();
- $tree = $parser->parse("(SELECT x FROM table) ORDER BY x");
- var_dump($tree);

There is nothing substantial under the SELECT portion of $tree even though 
there should be

Thanks,
-George
```

Original issue reported on code.google.com by `noisecap...@gmail.com` on 28 Jan 2014 at 11:28
