Ticket #34437: image_downsize.patch

wp-includes/media.php

@@ -2909 +2909 @@
 
                         /** This filter is documented in wp-includes/media.php */
                         if ( $downsize = apply_filters( 'image_downsize', false, $attachment->ID, $size ) ) {
-                                if ( ! $downsize[3] )
+                                if ( ! isset( $downsize[3] ) )
                                         continue;
                                 $sizes[ $size ] = array(
                                         'height'      => $downsize[2],