Customize: Use `is_header_video_active()` as `active_callback` for `external_header_video` control instead of `is_front_page()`.

Use the same `active_callback` as was supplied previously for the `header_video` control in [39240] where this instance was missed.

Amends [39240].
Props pratikshrestha.
See #38738.
Fixes #40308.

Built from https://develop.svn.wordpress.org/trunk@40379


git-svn-id: http://core.svn.wordpress.org/trunk@40286 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-customize-manager.php

@@ -3959,7 +3959,7 @@ final class WP_Customize_Manager {
 			'type'           => 'url',
 			'description'    => __( 'Or, enter a YouTube URL:' ),
 			'section'        => 'header_image',
-			'active_callback'=> 'is_front_page',
+			'active_callback' => 'is_header_video_active',
 		) );
 
 		$this->add_control( new WP_Customize_Header_Image_Control( $this ) );

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-40378';
+$wp_version = '4.8-alpha-40379';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.