Bug 20546: Display shelving location on checkin

Bug 20546: Display shelving location on checkin

Currently, the sehlving location is not being displayed in the table
of checked in items on <intranet>/cgi-bin/koha/circ/returns.pl

To test:
- Make sure you have a couple of books with a value for shelving location (952$c)
- Check the books out
- Check the books in
- Verify nothing is displayed in the "Shelving location" column
- Apply this patch
- Check the books out and in again
- Verify the shelving location is now being displayed

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>