Don't force child_of=0 for non-hierarchical taxonomies in `get_terms()`.

This forcing appears to have been introduced to save unnecessary queries, but
(a) in some cases it appeared to be causing *more* queries, and (b) it caused
incorrect results when the 'exclude_tree' param of `get_terms()` called
`get_terms()` on each item in the tree using the 'child_of' param.

Fixes #30275.
Built from https://develop.svn.wordpress.org/trunk@30265


git-svn-id: http://core.svn.wordpress.org/trunk@30265 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/taxonomy.php

@@ -1649,7 +1649,6 @@ function get_terms( $taxonomies, $args = '' ) {
 
 	// Save queries by not crawling the tree in the case of multiple taxes or a flat tax.
 	if ( ! $single_taxonomy || ! is_taxonomy_hierarchical( reset( $taxonomies ) ) ) {
-		$args['child_of'] = false;
 		$args['hierarchical'] = false;
 		$args['pad_counts'] = false;
 	}

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.1-alpha-30264';
+$wp_version = '4.1-alpha-30265';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.