Add test for recursive __debugInfo()

This also got fixed by switching to object apply count.

Author: nikic

Zend/tests/recursive_debug_info.phpt

@@ -0,0 +1,19 @@
+--TEST--
+Test recursive __debugInfo() method
+--FILE--
+<?php
+
+class Test {
+    public function __debugInfo() {
+        return [$this];
+    }
+}
+
+var_dump(new Test);
+
+?>
+--EXPECT--
+object(Test)#1 (1) {
+  [0]=>
+  *RECURSION*
+}