Media: In `WP_Image_Editor::make_image()`, close previously opened output buffer if the file could not be created.

Props dhanendran, gnif.
Fixes #43255.
Built from https://develop.svn.wordpress.org/trunk@42695


git-svn-id: http://core.svn.wordpress.org/trunk@42523 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-image-editor.php

@@ -409,6 +409,9 @@ abstract class WP_Image_Editor {
 			$fp = fopen( $filename, 'w' );
 
 			if ( ! $fp ) {
+				if ( $stream ) {
+					ob_end_clean();
+				}
 				return false;
 			}
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.0-alpha-42694';
+$wp_version = '5.0-alpha-42695';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.