Quantity Price Breaks Per Product

[michael_s]

More bugfixes:

- Bugfix in includes/classes/PriceFormatter where two variables needed conversion when information was retrieved from PriceFormatterStore (regarding qtyBlocks and special price)
Two more bugfixes in case there are no price breaks. sunrise99/David was right when he said $this->price_break can be empty. It *can* happen when the product is already in the cart in two places (one when dealing with special prices)
Upload the new file in case of upgrading from 1.3.2b
- Bugfix in admin/categories.php where a warning is echo'ed multiple times in the price break part because $price_breaks is not an array:
around line 715:

if(array_key_exists($count, $price_breaks_array)) {
is changed to
if(is_array($price_breaks_array) && array_key_exists($count, $price_breaks_array)) {

- Bugfix in includes/modules/product_listing.php where with MySQL4 you get an error on line 92 about product_id being ambiguous (doesn't happen in MySQL5).

using(products_id) where products_id
was changed to
using(products_id) where p.products_id


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