REST API: Correct variable type in `WP_Rest_Server::serve_batch_request_v1()`.

`wp_parse_str()` expects an array as the second parameter.

Follow-up to [49252].

Props antonvlasenko.
See #61593.
Built from https://develop.svn.wordpress.org/trunk@58688


git-svn-id: http://core.svn.wordpress.org/trunk@58090 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/rest-api/class-wp-rest-server.php

@@ -1667,7 +1667,7 @@ class WP_REST_Server {
 			$single_request = new WP_REST_Request( isset( $args['method'] ) ? $args['method'] : 'POST', $parsed_url['path'] );
 
 			if ( ! empty( $parsed_url['query'] ) ) {
-				$query_args = null; // Satisfy linter.
+				$query_args = array();
 				wp_parse_str( $parsed_url['query'], $query_args );
 				$single_request->set_query_params( $query_args );
 			}

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.7-alpha-58687';
+$wp_version = '6.7-alpha-58688';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.