Fixed the checking of maximum coupon usage count

core/lib/Thelia/Coupon/CouponFactory.php

@@ -69,7 +69,7 @@ class CouponFactory
         }
 
         // Check coupon usage count
-        if ($couponModel->getUsagesLeft($this->facade->getCustomer()->getId()) <= 0) {
+        if (! $couponModel->isUsageUnlimited() && $couponModel->getUsagesLeft($this->facade->getCustomer()->getId()) <= 0) {
              throw new CouponNoUsageLeftException($couponCode);
         }
 

core/lib/Thelia/Coupon/CouponManager.php

@@ -278,6 +278,10 @@ class CouponManager
      */
     public function decrementQuantity(Coupon $coupon, $customerId = null)
     {
+        if ($coupon->isUsageUnlimited()) {
+            $ret = true;
+        }
+        else {
             $ret = false;
 
             try {
@@ -330,6 +334,7 @@ class CouponManager
                 // Just log the problem.
                 Tlog::getInstance()->addError(sprintf("Failed to decrement coupon %s: %s", $coupon->getCode(), $ex->getMessage()));
             }
+        }
 
         return $ret;
     }