Media: Use wp_basename() to create attachment titles from filenames.

In [38294], `pathinfo()` was used with the `PATHINFO_BASENAME` constant to
get the basename of the file to be used as an attachment title, which depends
on PHP locale and can cause issues with UTF-8 characters. This uses
`wp_basename()` instead, which is a more i18n-friendly version of `basename()`.

Props SergeyBiryukov.
Fixes #37608, #37989.
Built from https://develop.svn.wordpress.org/trunk@38673


git-svn-id: http://core.svn.wordpress.org/trunk@38616 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/media.php

@@ -283,7 +283,9 @@ function media_handle_upload($file_id, $post_id, $post_data = array(), $override
 	if ( isset($file['error']) )
 		return new WP_Error( 'upload_error', $file['error'] );
 
-	$name = pathinfo( $_FILES[$file_id]['name'], PATHINFO_FILENAME );
+	$name = $_FILES[$file_id]['name'];
+	$ext  = pathinfo( $name, PATHINFO_EXTENSION );
+	$name = wp_basename( $name, ".$ext" );
 
 	$url = $file['url'];
 	$type = $file['type'];

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-alpha-38672';
+$wp_version = '4.7-alpha-38673';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.