opcache_get_status() returns FALSE on failure

Cf. <php/php-src#2031 (comment)>.

git-svn-id: http://svn.php.net/repository/phpdoc/en@345790 c90b9560-bf6c-de11-be94-00142212c4b1

Author: cmb

trunk/reference/opcache/functions/opcache-get-status.xml

@@ -35,7 +35,8 @@
  <refsect1 role="returnvalues">
   &reftitle.returnvalues;
   <para>
-   Returns an array of information, optionally containing script specific state information
+   Returns an array of information, optionally containing script specific state information,
+   &return.falseforfailure;.
   </para>
  </refsect1>