search-engine-recent: don't ref/unref query added to self
Since this is already part of the search engine struct, and given that we ref it, there's no point of reffing the query again.
Also not to create a mem-leak when we don't run it.
Since this is already part of the search engine struct, and given that we ref it, there's no point of reffing the query again.
Also not to create a mem-leak when we don't run it.