Display associated image of product variant in cart.liquid

cart-snippet.liquid

<a href="{{ item.product.url }}" title="{{ item.product.title | escape }}">
  {% assign found = false %}
  {% for img in item.product.images %}
    {% if found == false and item.variant.title contains img.alt %}
      <img src="{{ img | product_img_url: 'thumb' }}"  alt="{{ item.alt | escape }}" />
      {% assign found = true %}
     {% endif %}
  {% endfor %}
  {% if found == false %}
    <img src="{{ item.product.featured_image | product_img_url: 'thumb' }}"  alt="{{ item.product.featured_image.alt | escape }}" />
  {% endif %}           
</a>