[perl5-dbi/dbi] 50d53f: add warning on unregistered driver (RT#93204)

[Jens Rehsack]

  Branch: refs/heads/master
  Home:   https://github.com/perl5-dbi/dbi
  Commit: 50d53fbfdbb903bdd50e748376b3b62346d0afe2
      
https://github.com/perl5-dbi/dbi/commit/50d53fbfdbb903bdd50e748376b3b62346d0afe2
  Author: Jens Rehsack <s...@netbsd.org>
  Date:   2014-02-26 (Wed, 26 Feb 2014)

  Changed paths:
    M lib/DBI/DBD/SqlEngine.pm

  Log Message:
  -----------
  add warning on unregistered driver (RT#93204)