[parrot/parrot] b4dd71: [pmc] rpa refactor delete_keyed_int, add tests

[GitHub]

  Branch: refs/heads/smoke-me/rpa-offset-gh1152
  Home:   https://github.com/parrot/parrot
  Commit: b4dd715778df3f8e42bbe2a8e417f5260c792df9
      https://github.com/parrot/parrot/commit/b4dd715778df3f8e42bbe2a8e417f5260c792df9
  Author: Reini Urban <rurban at cpanel.net>
  Date:   2014-12-03 (Wed, 03 Dec 2014)

  Changed paths:
    M src/pmc/resizablepmcarray.pmc
    M t/pmc/resizablepmcarray.t

  Log Message:
  -----------
  [pmc] rpa refactor delete_keyed_int, add tests

also prepare do_unshift optimization, add slack offset if slow