Bug 20274: Itemtypes report gives zero results if item-level_itypes set to bibliograp...

Bug 20274: Itemtypes report gives zero results if item-level_itypes set to bibliographic records

1) Go to reports then catalog by item types
2) Pick a location and look at table
3) Change the system prefernce of item-level_itypes
4) Verify a zero result
5) Apply patch and retry
6) Verify that result does not change to zero on either preference

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>