NR error: "Undefined method '[]' for nil:NilClass" in QueryBuilder#search_location

[yozlet]

New Relic example. Frequency: 16 times from Jan 1 to Jan 7.

Stack trace:

NoMethodError: undefined method `[]' for nil:NilClass
         /home/vcap/app/lib/data_magic/query_builder.rb:  132:in `search_location'
         /home/vcap/app/lib/data_magic/query_builder.rb:   30:in `generate_squery'
         /home/vcap/app/lib/data_magic/query_builder.rb:   13:in `from_params'
                       /home/vcap/app/lib/data_magic.rb:   69:in `search'
                      /home/vcap/app/app/controllers.rb:   53:in `block (2 levels) in <top (required)>'
(eval):225:in `block in call'
(eval):214:in `catch'

Refers to this line:

squery = squery.geo('location', distance: distance, lat: location[:lat], lng: location[:lon])

[yozlet]

Fixed by #286.