Sergey Biryukov d8ddd686d5 In get_post_class(), ensure that we always coerce the class list passed to the function to an array, even when it's empty.
This is consistent with `get_body_class()`, see [18176].

See #34452.

git-svn-id: https://develop.svn.wordpress.org/trunk@35399 602fd350-edb4-49c9-b593-d223f7449a82
2015-10-26 15:08:47 +00:00
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