How do I get product-list.tpl to check if a product has attributes that change the price V1.6

[skinnybloke]

Hi - I want to display the text 'from' in front of the price on product-list.tpl when the product has attributes but only when the attributes change the price of the product.

 

This bit of code checks if the product has attributes:

{if $product.id_product_attribute}{l s='from'}{/if}

but obviously not if they will change the price.

 

Can anybody help?

 

Using v1.6.0.9