Template: Add fallback for empty containers.

Since [14031] the container can be omitted in `wp_nav_menu()`. It can not
however in `wp_page_menu()`, which creates a conflict if it is set as
the fallback, Let's make sure there is always a valid container tag.

Fixes #33974.


Built from https://develop.svn.wordpress.org/trunk@34950


git-svn-id: http://core.svn.wordpress.org/trunk@34915 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/post-template.php

@@ -1275,6 +1275,11 @@ function wp_page_menu( $args = array() ) {
 
 	$container = sanitize_text_field( $args['container'] );
 
+	// Fallback in case `wp_nav_menu()` was called without a container.
+	if ( empty( $container ) ) {
+		$container = 'div';
+	}
+
 	if ( $menu ) {
 
 		// wp_nav_menu doesn't set before and after

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-34949';
+$wp_version = '4.4-alpha-34950';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.