vty: show subscriber: put() before printing the use count

Do not show the VTY command's own use count during 'show subscriber <ID>'.

When using 'show subscriber msisdn 2023', I was surprised to see a use count of
2 and suspected a use count leak. With 'show subscriber cache' however, the use
count is 1.

So I realized it is the vty command's own use count that makes it two, besides
the lu_complete=true one.

Change-Id: Id02b57b7ed299b010b9f8b9e809548eb1e6aa699
1 file changed