TripPin `/People?$select=AddressInfo` returns a 500 error

[robertmclaws]

When running this query against TripPin, you receive a 500 server error with the following response:
{"error":{"code":"","message":"Value cannot be null.\r\nParameter name: source"}}

The response should be a 400 with a better error message, or the entites in question if this is a properly formed request.

This is likely related to OData/WebApi#2737.