Description:
------------
Greetings!

I have an interesting problem, using prepare() method of interface class DB_Common in package PEAR DB (last version, 1.5.0RC1).
According to documentation, it must return resource, but it returns 0! So, I cannot use "execute()". There's no even error!
Though, connection is established correctly, and the queries work properly, using such methods as query, getRow, etc.

If I use query or get* methods as workaround, for example:
$DB->query("SELECT type_name FROM FOO WHERE ?=?", array("type_id", 3));
, then everything goes fine.

Reproduce code:
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<?
require_once ("common/conf/config.inc.php");	// Here the $CONFIG array is defined
require_once ("DB.php");
	
$db_host = $CONFIG['db']['host'];
$db_type = $CONFIG['db']['dbtype'];
$db_name = $CONFIG['db']['dbname'];
$db_user = $CONFIG['db']['user'];
$db_pwd = $CONFIG['db']['password'];
	
$dsn = "$db_type://$db_user:$db_pwd@$db_host/$db_name";
	
$DB = DB::connect($dsn);
if (DB::isError($DB)) 
   die ($DB->getMessage());

$prep_stmt = $DB->prepare("SELECT type_name FROM FOO WHERE type_id=?");
if (DB::isError($DB)) 
   die ($DB->getMessage());  // Just to be sure that PEAR still thinks that all is OK
echo "PREPARED STATEMENT: '$prep_stmt', type is " . gettype($prep_stmt);
?>

Expected result:
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The query handle, of type 'resourse', according to documentation.
(I don't know the right output text to be, just because I've never got one).

Actual result:
--------------
PREPARED STATEMENT: '0', type is integer