Link to collections instead of vendors

sometimes we want to link to a collection if there is one for the vendor.

{% for collection in collections %}	
{% if collection.title == product.vendor %}
{% capture thecollection %}<a class="product-brand" href="/collections/{{ collection.handle }}">{{ collection.title }}</a>{% endcapture %}
{% endif %}
{% endfor %}

{% if thecollection == '' %}
<a class="product-brand" href="{{ product.vendor | url_for_vendor }}">{{ product.vendor }}</a>
{% else %} 
{{ thecollection }}
{% endif %}