Warning: Illegal string offset

[D. C. Stoyanov]

From a user’s report:

I delete the Page Playground (make the content empty and save it)
Then I got this error massage:

DokuWiki: newest version
PHP: 7.1

Warning: Illegal string offset 'plugin_acmenu' in /var/www/wyns37h/htdocs/dokuwiki/lib/plugins/acmenu/action.php on line 51

Warning: Illegal string offset 'sub_ns' in /var/www/wyns37h/htdocs/dokuwiki/lib/plugins/acmenu/action.php on line 51

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[D. C. Stoyanov]

I can confirm that these warning happens (not always) when deleating pages.

[D. C. Stoyanov]

fix issue #24

→ <<cset 774ba2600d7c>>