[D-runtime] [D-Programming-Language/druntime] 4606d0: reverting revert

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/D-Programming-Language/druntime
  Commit: 4606d0e6c75cf54223638ecbe3b32234dded4dc1
      https://github.com/D-Programming-Language/druntime/commit/4606d0e6c75cf54223638ecbe3b32234dded4dc1
  Author: Walter Bright <walter at walterbright.com>
  Date:   2012-07-18 (Wed, 18 Jul 2012)

  Changed paths:
    M src/core/bitop.d

  Log Message:
  -----------
  reverting revert