nil exception for certain search conditions

[dollschasingmen]

NoMethodError: undefined method `gsub!' for nil:NilClass
1
File "/usr/local/bundle/gems/aleph_analytics-0.0.5/lib/pagination_search/search_conditions.rb" line 54 in block (2 levels) in attribute_cleaned
2
File "/usr/local/bundle/gems/aleph_analytics-0.0.5/lib/pagination_search/search_conditions.rb" line 54 in each
3
File "/usr/local/bundle/gems/aleph_analytics-0.0.5/lib/pagination_search/search_conditions.rb" line 54 in block in attribute_cleaned
4
File "/usr/local/bundle/gems/aleph_analytics-0.0.5/lib/pagination_search/search_conditions.rb" line 53 in each
5
File "/usr/local/bundle/gems/aleph_analytics-0.0.5/lib/pagination_search/search_conditions.rb" line 53 in attribute_cleaned
6
File "/usr/local/bundle/gems/aleph_analytics-0.0.5/lib/pagination_search/search_conditions.rb" line 30 in process
7
File "/usr/local/bundle/gems/aleph_analytics-0.0.5/lib/pagination_search/base_relation.rb" line 19 in searched

minor bug that clogs up monitoring