Running a query in the repository servlet incorrectly shows "-1 results"

If you run a query in the repository servlet, you always get "-1 results", even though you can see the actual results properly.

1. Create an archetype project (7.8.8)
2. Go to http://localhost:8080/cms/repository/
3. Run a query, for example select * from myhippoproject:newsdocument

Expected:
Number of results found: XX

Actual:
Number of results found: -1