- Check that an argument is always available, otherwise current map
printing before to recurse is garbage.
- Spit out a message if an argument is not provided.
- Remove unread nlines variable.
- Use an explicit recursive function, disassociated from the
DB_SHOW_COMMAND() body, in order to make clear prototype and recursion
of the above mentioned function. The code results now much less
obscure.
Submitted by: gianni