[parrot/parrot] 0cc54e: [GH 811] fix seek() sign-conversion error

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/parrot/parrot
  Commit: 0cc54e6972ae830e7943a15c8db1e14fc9c3cb90
      https://github.com/parrot/parrot/commit/0cc54e6972ae830e7943a15c8db1e14fc9c3cb90
  Author: Andy Dougherty <doughera at lafayette.edu>
  Date:   2012-09-04 (Tue, 04 Sep 2012)

  Changed paths:
    M src/io/utilities.c
    M t/pmc/filehandle.t

  Log Message:
  -----------
  [GH 811] fix seek() sign-conversion error

Nicholas Clark correctly analyzed it by studying strace.
Andy Dougherty came with the patch. Confirmed by rurban.