'Spent Time' link is broken

[lajish]

Hi there,

This is a good initiative for creating timelogs. But it has some bugs.
On clicking Time Spent link on tracker summary page, it gets broken

This is what i got in production log.

Started GET "/redmine/projects/3-15-build/issues/1600/time_entries" for 127.0.0.1 at 2014-10-04 13:47:16 +0530
Processing by TimelogController#index as HTML
Parameters: {"project_id"=>"3-15-build", "issue_id"=>"1600"}
Current user: [email protected] (id=4)
Completed 500 Internal Server Error in 978.6ms

TypeError (can't dup NilClass):
app/models/query.rb:343:in add_filter' app/models/time_entry_query.rb:35:ininitialize'
app/models/query.rb:231:in new' app/models/query.rb:231:inbuild_from_params'
app/controllers/timelog_controller.rb:45:in `index'