fix(Avail): fix exception due to no policies
Fix 101 due to an empty node of cancellation policies sent in the seller response.
Sellers at 2021-11-03:
- Orthodoxou Travel - [ORTD]
- CosmoBeds - [CBD]
- 3Full Steps - [TFS]
- Orthanna - [ORTH]
Fix 101 due to an empty node of cancellation policies sent in the seller response.
Sellers at 2021-11-03: