Add test

Forgot to commit this.

Author: nikic

ext/opcache/tests/preload_013.phpt

@@ -0,0 +1,18 @@
+--TEST--
+Nested function definition
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.optimization_level=-1
+opcache.preload={PWD}/preload_nested_function.inc
+opcache.interned_strings_buffer=0
+--SKIPIF--
+<?php require_once('skipif.inc'); ?>
+--FILE--
+<?php
+test();
+test2();
+?>
+===DONE===
+--EXPECT--
+===DONE===

ext/opcache/tests/preload_nested_function.inc

@@ -0,0 +1,7 @@
+<?php
+
+function test()
+{
+    function test2() { }
+}
+