Joe McGill 173f9b6f22 Media: Better handling of JOINs when searching filenames.
Following [38625], any media searches that already included JOINs,
e.g., `tax_queries`, would get trampled when we joined the post meta
table to search for filenames. This preserves existing JOINs and
also only applies the `_filter_query_attachment_filenames()` filter
when a search query is being performed.

Props flixos90, joemcgill.
Fixes #22744.
Built from https://develop.svn.wordpress.org/trunk@38733


git-svn-id: http://core.svn.wordpress.org/trunk@38676 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-10-05 19:51:30 +00:00
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2016-07-26 23:24:28 +00:00