Boone Gorges 60c26865f9 Check that $_POST array index is set before comparing it in post_preview(). ...

This prevents PHP notices in cases where a user with 'edit_others_posts' but
without 'publish_posts' previews another user's posts.

Props tyxla.
Fixes #31760.
Built from https://develop.svn.wordpress.org/trunk@31896


git-svn-id: http://core.svn.wordpress.org/trunk@31875 1a063a9b-81f0-0310-95a4-ce76da25c4cd

2015-03-26 01:45:26 +00:00

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