WPDB: Reset connection status variables when the connection is closed.

Fixes #36240.


Built from https://develop.svn.wordpress.org/trunk@36997


git-svn-id: http://core.svn.wordpress.org/trunk@36964 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.5-beta3-36996';
+$wp_version = '4.5-beta3-36997';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.

wp-includes/wp-db.php

@@ -3116,6 +3116,8 @@ class wpdb {
 
 		if ( $closed ) {
 			$this->dbh = null;
+			$this->ready = false;
+			$this->has_connected = false;
 		}
 
 		return $closed;