Use ms_site['blog_id'] if isset else ms_site->blog_id

Author: lesterchan

uninstall.php

@@ -15,7 +15,8 @@
 
 	if( 0 < sizeof( $ms_sites ) ) {
 		foreach ( $ms_sites as $ms_site ) {
-			switch_to_blog( $ms_site['blog_id'] );
+			$blog_id = isset( $ms_site['blog_id'] ) ? $ms_site['blog_id'] : $ms_site->blog_id;
+			switch_to_blog( $blog_id );
 			if( sizeof( $option_names ) > 0 ) {
 				foreach( $option_names as $option_name ) {
 					delete_option( $option_name );