blockchain.info multi address lookup
If you are only interested in the balance of multiple addresses I would suggest you use the following call in stead:

https://blockchain.info/balance?active=1NiNja1bUmhSoTXozBRBEtR8LeF9TGbZBN|1MrkWMnWLW53SQVQ5Pd2BsugY1F8H1oKio

But if you need to use multi address the limit flag seems to be wrong in the documentation, it should be 'n' and the minimum limit allowed seems to be 1. 0 will just return all transactions anyway.

https://blockchain.info/multiaddr?active=1NiNja1bUmhSoTXozBRBEtR8LeF9TGbZBN|1MrkWMnWLW53SQVQ5Pd2BsugY1F8H1oKio&amp;n=1