Widgets: In `WP_Widget_Media`, apply `widget_title` filter regardless of whether the title is empty, same as other widgets do.

Props Bsop.
Fixes #42226.
Built from https://develop.svn.wordpress.org/trunk@41866


git-svn-id: http://core.svn.wordpress.org/trunk@41700 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-beta2-41865';
+$wp_version = '4.9-beta2-41866';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.

wp-includes/widgets/class-wp-widget-media.php

@@ -213,10 +213,10 @@ abstract class WP_Widget_Media extends WP_Widget {
 
 		echo $args['before_widget'];
 
-		if ( $instance['title'] ) {
-
 		/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
 		$title = apply_filters( 'widget_title', $instance['title'], $instance, $this->id_base );
+
+		if ( $title ) {
 			echo $args['before_title'] . $title . $args['after_title'];
 		}