Boone Gorges cac6d65780 Improve error handling in get_categories(). ...

When passed an invalid `'taxonomy'`, `get_terms()` will return a `WP_Error`
object. This object should not be blindly cast to an array. Instead, an empty
array should be returned, to indicate that no matching terms have been found.

Props virgodesign, sebastian.pisula.
Fixes #36227.
Built from https://develop.svn.wordpress.org/trunk@36988


git-svn-id: http://core.svn.wordpress.org/trunk@36955 1a063a9b-81f0-0310-95a4-ce76da25c4cd

2016-03-14 13:53:28 +00:00

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