Added test case for bug #50632

ext/filter/tests/bug50632.phpt

@@ -0,0 +1,11 @@
+--TEST--
+bug 50632, filter_input() does not return default value if the variable does not exist
+--SKIPIF--
+<?php if (!extension_loaded("filter")) die("skip"); ?>
+--FILE--
+<?php
+$foo = filter_input(INPUT_GET, 'foo', FILTER_VALIDATE_INT, array('flags' => FILTER_REQUIRE_SCALAR, 'options' => array('default' => 23)));
+var_dump($foo);
+?>
+--EXPECT--	
+int(23)