Add test for curl_mutli_close on non curl multi resource

Author: scrx

ext/curl/tests/curl_multi_close_basic001.phpt

@@ -0,0 +1,25 @@
+--TEST--
+curl_multi_close return false when suplied resorce not valid cURL multi handle
+--SKIPIF--
+<?php
+if (!extension_loaded('curl')) print 'skip';
+?>
+--FILE--
+<?php
+$cmh = curl_multi_init();
+var_dump($cmh);
+$multi_close_result = curl_multi_close($cmh);
+var_dump($multi_close_result);
+var_dump($cmh);
+$bad_mh_close_result = curl_multi_close($cmh);
+var_dump($bad_mh_close_result);
+?>
+===DONE===
+--EXPECTF--
+resource(%d) of type (curl_multi)
+NULL
+resource(%d) of type (Unknown)
+
+Warning: curl_multi_close(): supplied resource is not a valid cURL Multi Handle resource in %s on line %d
+bool(false)
+===DONE===