Make WP_Image_Editor::make_image() safe for replication plugins by making sure the directory for the image being made exists.

Props batmoo
fixes #23306


git-svn-id: http://core.svn.wordpress.org/trunk@23744 1a063a9b-81f0-0310-95a4-ce76da25c4cd

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

@@ -326,6 +326,9 @@ abstract class WP_Image_Editor {
 	protected function make_image( $filename, $function, $arguments ) {
 		$dst_file = $filename;
 
+		// The directory containing the original file may no longer exist when using a replication plugin.
+		wp_mkdir_p( dirname( $dst_file ) );
+
 		if ( $stream = wp_is_stream( $filename ) ) {
 			$filename = null;
 			ob_start();