In `media/views/embed/link.js`, URLs should have a valid protocol before an attempt to fetch them is made.

Fixes #32037.

Built from https://develop.svn.wordpress.org/trunk@32459


git-svn-id: http://core.svn.wordpress.org/trunk@32429 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/js/media-views.js

@@ -4546,7 +4546,7 @@ EmbedLink = wp.media.view.Settings.extend({
 		this.$( '.setting' ).hide();
 
 		// only proceed with embed if the field contains more than 6 characters
-		if ( url && url.length < 6 ) {
+		if ( url && ( url.length < 6 || ! url.match(/^http(s)?:\/\//) ) ) {
 			return;
 		}
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.3-alpha-32458';
+$wp_version = '4.3-alpha-32459';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.