#208 dir.c supports inmem databases in version 5

A solution, which enables inmem databases using trough the ged tool.

Change in librt/dir.c at rt_db_put_internal(....).

As discussed in: https://sourceforge.net/p/brlcad/discussion/362510/thread/ce59d899/?limit=25#077e/bdce

[Anonymous]

This patch is based on 7.22.

2Edit: It works with 7.24 as well!!!