WP_User_Query: When querying users with 'fields=all', ensure that caps and roles are filled for the current site.

See [15566] for a parallel fix for 'fields=all_with_meta'.

Fixes #31878.

git-svn-id: https://develop.svn.wordpress.org/trunk@32001 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/user.php

@@ -857,7 +857,7 @@ class WP_User_Query {
 			$this->results = $r;
 		} elseif ( 'all' == $qv['fields'] ) {
 			foreach ( $this->results as $key => $user ) {
-				$this->results[ $key ] = new WP_User( $user );
+				$this->results[ $key ] = new WP_User( $user, '', $qv['blog_id'] );
 			}
 		}
 	}