cart module code prevents module from being shown

HIka version 2-1-3
I have a problem with the modified code of my cart module (html/com_hikashop/product/cart.php). If I use this modified code, the module contains no html on every non-product pages. On product pages, it works.
If I use no file "cart.php" in the product folder or use an older file, everything is OK.
I can't figure out, which part of the module code erases the complete cart html code, the outer divs should be shown always, right?

Please help!

Hi,

I think it's that line:
if ($jinput->get('option', 'default_value', 'filter')=="com_hikashop"){

That if will only run the code inside it if the current component page is a HikaShop page.