Description:
------------
When executing a query, where field names are quoted, and using GROUP BY, the field names are returned with quotes around.

This error may very well be in sqlite, and not with PHP, but I have no way of verifying that hunch.

Using SQLite:

SQLite support => enabled
PECL Module version => 2.0-dev $Id: sqlite.c,v 1.166.2.13.2.7 2007/03/06 02:17:13 stas Exp $
SQLite Library => 2.8.17
SQLite Encoding => iso8859


Reproduce code:
---------------
<?php
$db = sqlite_open(":memory:");
sqlite_query($db, '
  CREATE TABLE test (
    id INTEGER PRIMARY KEY
  )
');
sqlite_query($db, "INSERT INTO test (id) VALUES (1)");
$result = sqlite_query($db, 'SELECT "id" FROM "test" GROUP BY "id"');
var_dump(sqlite_fetch_array($result, SQLITE_ASSOC));

Expected result:
----------------
array(1) {
  ["id"]=>
  string(1) "1"
}


Actual result:
--------------
array(1) {
  [""id""]=>
  string(1) "1"
}