XML-RPC: Correct argument mismatch in ::_multisite_getUsersBlogs().

This ensures that `::wp_getUsersBlogs()` receives the valid authentication arguments when called from `::blogger_getUsersBlogs()` via `::_multisite_getUsersBlogs()`.

Follow-up to [54468].

Props sainathpoojary, SergeyBiryukov.
Fixes #65536.

git-svn-id: https://develop.svn.wordpress.org/trunk@62572 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

src/wp-includes/class-wp-xmlrpc-server.php

@@ -4892,7 +4892,7 @@ protected function _multisite_getUsersBlogs( $args ) {
 		$domain = $current_blog->domain;
 		$path   = $current_blog->path . 'xmlrpc.php';
 
-		$blogs = $this->wp_getUsersBlogs( $args );
+		$blogs = $this->wp_getUsersBlogs( array( $args[1], $args[2] ) );
 		if ( $blogs instanceof IXR_Error ) {
 			return $blogs;
 		}

tests/phpunit/tests/xmlrpc/blogger/getUsersBlogs.php

@@ -0,0 +1,28 @@
+<?php
+
+/**
+ * @group xmlrpc
+ * @group user
+ */
+class Tests_XMLRPC_blogger_getUsersBlogs extends WP_XMLRPC_UnitTestCase {
+
+	/**
+	 * @ticket 65536
+	 * @group ms-required
+	 * @group multisite
+	 */
+	public function test_multisite_argument_parsing() {
+		$subscriber_id = $this->make_user_by_role( 'subscriber' );
+
+		$result = $this->myxmlrpcserver->blogger_getUsersBlogs( array( 1, 'subscriber', 'subscriber' ) );
+
+		$this->assertNotIXRError( $result, 'The result should not be an instance of IXR_Error.' );
+		$this->assertIsArray( $result, 'The result should be an array.' );
+		$this->assertNotEmpty( $result, 'The result should not be empty.' );
+
+		$blog = $result[0];
+		$this->assertArrayHasKey( 'url', $blog, 'The result should include the url field.' );
+		$this->assertArrayHasKey( 'blogid', $blog, 'The result should include the blogid field.' );
+		$this->assertArrayHasKey( 'blogName', $blog, 'The result should include the blogName field.' );
+	}
+}