Ticket #21959: 21959.patch

wp-includes/media.php

@@ -454 +454 @@
                 $dir = $_dest_path;
         $destfilename = "{$dir}/{$name}-{$suffix}.{$ext}";
 
+        $destfilename = apply_filters( 'image_resize_destination_filename', $destfilename, $suffix, $ext, $file );
+
         if ( IMAGETYPE_GIF == $orig_type ) {
                 if ( !imagegif( $newimage, $destfilename ) )
                         return new WP_Error('resize_path_invalid', __( 'Resize path invalid' ));