Description:
------------
PHP output warning:
Warning: Unknown: invalid statement handle in Unknown on line 0

if don't use "connection_id" as parameter for function ibase_close()

Firebird 2.0 Release Candidate

Reproduce code:
---------------
<?
	ibase_connect("localhost:D:\\test.gdb", "SYSDBA", "masterkey");
	$prep = ibase_prepare("SELECT * FROM TB_TEST");
	$res = ibase_execute($prep);
	while ($row = ibase_fetch_row($res))
	{
		print_r($row);
		print "<br />";
	}
	ibase_close();
?>

Expected result:
----------------
output list of data in table

Actual result:
--------------
output list of data in table
and
Warning: Unknown: invalid statement handle in Unknown on line 0