Description:
------------
Add constant FILTER_EXCEPTION_ON_FAILURE to throw meaningful exceptions 
why filter fails

Reproduce code:
---------------
<?php

$foo = filter_input(INPUT_GET, 'foo', FILTER_VALIDATE_INT, array(
    'flags' => FILTER_REQUIRE_SCALAR + FILTER_EXCEPTION_ON_FAILURE,
    'options' => array(
        'min_range' => 5,
        'max_range' => 42
    )
));

var_dump($foo);

?>

Expected result:
----------------
Fatal error: Uncaught exception 'OutOfBoundsException' with message 'foo 
must an integer in range between 5 and 42' in input.php:3 Stack trace: 
#0 {main} thrown in input.php on line 3

Actual result:
--------------
bool(false)