BUG : Items with no sizes not adding to Vault

[tomik-z-cech]

Describe the bug :
Items that has no sizes are not adding to Vault from the Item Detail page.

To Reproduce :

• Navigate to shop
• Navigate to any item that does't have different sizes
• Click "Add to Vault" button
• Navigate to Vault
• See item is not added

Expected behavior :
All items can be added to Vault.

Screenshots :
N/A

Devices :
All devices.

Additional context :
Possible if / else statement in add_to_vault method.

[tomik-z-cech]

Changed default size in checkout views.py from size = request.POST.get('size', 0) to size = request.POST.get('size', 1). This ensures correct multiplication of sub-methods.

Bug fixed in commit e960cf0.