Description:
------------
If mysql.trace_mode is set to 1 the code produces a warning:

Warning: (null)() [function.mysql-free-result]: 1 result set(s) not freed. Use mysql_free_result to free result sets which were requested using mysql_query() in Unknown on line 0.

Reproduce code:
---------------
<?
mysql_connect('anyhost', 'anyusr', 'anypass');
mysql_select_db('anydb');
$qResult = mysql_query("SELECT UID FROM Users LIMIT 1");
$aRow = mysql_fetch_assoc($qResult);
?>

Expected result:
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No warning should be displayed