Taxonomy: Don't pass results of 'count' query through 'get_terms' filter.

Use of the 'get_terms' filter was consolidated in [37572], with the
introduction of `WP_Term_Query`. At that time, the result of 'count=true'
queries began being filtered by 'get_terms'. This breaks existing 'get_terms'
callbacks, which often assume that the returned value will be an array or a
`WP_Error` object.

Props JustinSainton.
Fixes #36992.
Built from https://develop.svn.wordpress.org/trunk@37623


git-svn-id: http://core.svn.wordpress.org/trunk@37591 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/taxonomy.php

@@ -1208,6 +1208,11 @@ function get_terms( $args = array(), $deprecated = '' ) {
 
 	$terms = $term_query->query( $args );
 
+	// Count queries are not filtered, for legacy reasons.
+	if ( $term_query->query_vars['count'] ) {
+		return $terms;
+	}
+
 	/**
 	 * Filters the found terms.
 	 *

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.6-alpha-37622';
+$wp_version = '4.6-alpha-37623';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.