Bug 36687: Update itemtypes.notforloan to not allow NULL values and change to tinyint(1)

Bug 36687: Update itemtypes.notforloan to not allow NULL values and change to tinyint(1)

To test:
1. Have some itemtypes.notforloan values set to NULL.
2. APPLY PACTH, updatedatabase, restart_all
3. When you updatedatabase those values should be set to 0.
4. Try updating an itemtypes.notforloan value to NULL. You cannot.

Signed-off-by: Matt Blenkinsop <matt.blenkinsop@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>