[perl5-dbi/dbi] 724d5b: Clarify bind_col TYPE attribute is sticky

[martin]

  Branch: refs/heads/master
  Home:   https://github.com/perl5-dbi/dbi
  Commit: 724d5bba85c4bad7c89b17bf0e12369e3f2b9d53
      
https://github.com/perl5-dbi/dbi/commit/724d5bba85c4bad7c89b17bf0e12369e3f2b9d53
  Author: martin <martin@smtp.easysoft.local>
  Date:   2013-06-05 (Wed, 05 Jun 2013)

  Changed paths:
    M Changes
    M DBI.pm

  Log Message:
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  Clarify bind_col TYPE attribute is sticky