Notice: Undefined variable: pngquant…

I just upgraded to version 1.8.4 this morning on a client site (WordPress 3.8.1) this morning with WP_DEBUG enabled and received the following PHP notice:

Notice: Undefined variable: pngquant in /path/to/my/site/wp-content/plugins/ewww-image-optimizer/ewww-image-optimizer.php on line 624

It looks like when you’re initializing variables at the top of ewww_image_optimizer_path_check() the $pngquant variable isn’t getting the same love as the others. Dropping in $pngquant = false; with the others resolves the issue.

Great plugin, by the way.

https://wordpress.org/plugins/ewww-image-optimizer/