Edit EasyResponsiveImagesFormatter.php - adds check to prevent a divide by zero error

Closes #3510403

src/Plugin/Field/FieldFormatter/EasyResponsiveImagesFormatter.php

@@ -218,7 +218,7 @@ class EasyResponsiveImagesFormatter extends ImageFormatter {
           // resizer JavaScript.
           $original_width = $elements[$delta]['#item_attributes']['width']->value();
           $original_height = $elements[$delta]['#item_attributes']['height']->value();
-          $aspect_ratio = $original_width / $original_height;
+          $aspect_ratio = (($original_width > 0) && ($original_height > 0)) ? $original_width / $original_height : 1;
           $width = $elements[$delta]['#srcset'][0]['width'];
           $height = floor($width / $aspect_ratio);