[DynInst_API:] [dyninst/dyninst] 54a2de: Add some explicit casts from boost::tribool to boo...

["Mark W. Krentel" <noreply@xxxxxxxxxx>]

  Branch: refs/heads/master
  Home:   https://github.com/dyninst/dyninst
  Commit: 54a2debd94c3e8df3b6f1e579f1db02dae61cbb7
      https://github.com/dyninst/dyninst/commit/54a2debd94c3e8df3b6f1e579f1db02dae61cbb7
  Author: Mark W. Krentel <krentel@xxxxxxxx>
  Date:   2019-02-01 (Fri, 01 Feb 2019)

  Changed paths:
    M dataflowAPI/rose/util/Message.C
    M dataflowAPI/rose/util/Message.h

  Log Message:
  -----------
  Add some explicit casts from boost::tribool to bool for some code in (#541)

Add some explicit casts from boost::tribool to bool for some code in dataflowAPI/rose/util/Message.[Ch].  This was breaking the build when using boost >= 1.69.