Description:
------------
When you try to open(mode 0) not correct dbase file using dbase_open it should return just FALSE according to http://www.php.net/manual/en/function.dbase-open.php, instead it prints "unable to get header" and "Warning: dbase_open(): unable to open database".

Reproduce code:
---------------
code 1

<?php
	$db = dbase_open("ERR.DBF", 0);	
	dbase_close($db);
?>

code 2

<?php
	$db = @dbase_open("ERR.DBF", 0);
	@dbase_close($db);
?> 
 

Expected result:
----------------
No warning or "unable to get header", it should just return false (according to currenct documentation). Even if the warning is right behavior(and it's just missing from documentation), it still should be possible to hide "unable to get header" using @.

Actual result:
--------------
Fill "ERR.DBF" with anything else than correct dbase info and you get the "unable to get header" and "Warning ..." (code 1). Also it's not possible to hide "unable to get header" message, code 2 is using @-s and it still prints "unable to get header", when you dont use correct dbf file.