Description:
------------
In the standard include DB/common.php (/usr/local/lib/php) there is a bug on the raiseError function : 
Fatal error: Only variables or references can be returned by reference in /usr/local/lib/php/DB/common.php on line 298  

At this line, there is this : 
return PEAR::raiseError(null, $code, $mode, $options, $userinfo,'DB_Error', true);

I don't know what is the problem (i'm just transfering severals website on a new server using php5), but the website have no problem on the previous server using php4...

Reproduce code:
---------------
    function &raiseError($code = DB_ERROR, $mode = null, $options = null,
                         $userinfo = null, $nativecode = null)
    {
        // The error is yet a DB error object
        if (is_object($code)) {
            // because we the static PEAR::raiseError, our global
            // handler should be used if it is set
            if ($mode === null && !empty($this->_default_error_mode)) {
                $mode    = $this->_default_error_mode;
                $options = $this->_default_error_options;
            }
            return PEAR::raiseError($code, null, $mode, $options, null, null, true);
        }

        if ($userinfo === null) {
            $userinfo = $this->last_query;
        }

        if ($nativecode) {
            $userinfo .= " [nativecode=$nativecode]";
        }

        return PEAR::raiseError(null, $code, $mode, $options, $userinfo,
                                  'DB_Error', true);
    }


Actual result:
--------------
return PEAR::raiseError(null, $code, $mode, $options, $userinfo,'DB_Error', true);