Wishlist plugin conflict

Hi,

I’m working with your wonderful plugin, and added another plugin called yith wish list:
http://yithemes.com/blog/free-plugins/yith-woocommerce-wishlist-new-free-plugin-released/

When going to the wishlist page, which list the items on the wish list, I get the following error :

Fatal error: Call to a member function get_price() on a non-object in [PATH REMOVED]\wp-content\plugins\woocommerce-bulk-discount\woocommerce-bulk-discount.php on line 156

Would really appreciate your help to solve this.

http://ww.wp.xz.cn/plugins/woocommerce-bulk-discount/