Custom Graphic/Button Generates 'Undefined Variable' Errors in Debug Mode

Thanks for this plugin! To me, one outstanding issue…

In testing locally, I always have debug on just to see if anything’s misbehaving. 😉 When I add a custom graphic for the button and manually add the code to my template, I get these errors:

Notice: Undefined variable: button_fname in devsite\wp-content\plugins\add-to-any\add-to-any.php on line 246

Notice: Undefined variable: button_fname in devsite\wp-content\plugins\add-to-any\add-to-any.php on line 246

Notice: Undefined variable: button_text in devsite\wp-content\plugins\add-to-any\add-to-any.php on line 253

Searching for a solution, I found that this suggestion fixes the problem, though it would be nice to see the plugin updated so as not to break the fix!

In add-to-any.php, these are my modified lines that eliminate the error generation:

246
if ( (isset($button_fname)) && ($button_fname == 'favicon.png' || $button_fname == 'share_16_16.png' ) ) {

253
if( (isset($button_text)) && (!$button_fname || $button_fname == 'favicon.png' || $button_fname == 'share_16_16.png') ) {

Thanks again for your work on this plugin.