Check for WP_Error earlier in edit_post

[alexdunae]

When working with custom post types where I hadn't assign the edit_others capabilities, _wp_translate_postdata was returning WP_Error.

edit_post checks for WP_Error, but not before assuming that the return value is actually array and triggering an ugly error.

Sure, looks good. Will want to blame the surrounding code to see why that got inserted.

#14334 closed as a duplicate.

(In [16761]) Move [14551] to after the is_wp_error check. see #13133, fixes #15511, props alexdunae.