Hi,
I still don't understand why it doesn't work.
Are you editing the view from the HikaShop menu Display > Views or via FTP ?
Be sure that the modifications are not made directly in the hikashop component files but in the template overrides.
Try to remove the corresponding file in your template files via ftp and make the modification again from the menu "Display > Views".
If it still doesn't work, try to remove again the file and make the modification directly on the HikaShop file in "components/com_hikashop/views/product/tmpl/listing_img_pane.php"