[FIX] sale_coupon_delivery: never include the delivery into the order's base for coupon

before this commit, the delivery was included into the base of computation for coupon programs
meaning that:
have a program free shipping for orders above 50$
have a product with price included 48$
let's shipping costs be 9$
total price is 57$.
The program used to apply in that case, giving a total discounted price of 48$, when it should be 57$ with no discounts

after this commit, deliveries are excluded from the computation

OPW 766661

closes #1311

0 files changed, 0 insertions, 0 deletions