[parrot/parrot] 58fe27: fix for readall_s at EOF

[GitHub]

  Branch: refs/heads/smoke-me/readall_gentoo_gh981
  Home:   https://github.com/parrot/parrot
  Commit: 58fe275cea232540b040ad9ab90f14dc355b0c31
      https://github.com/parrot/parrot/commit/58fe275cea232540b040ad9ab90f14dc355b0c31
  Author: Tobias Leich <email at froggs.de>
  Date:   2013-09-29 (Sun, 29 Sep 2013)

  Changed paths:
    M src/io/api.c

  Log Message:
  -----------
  fix for readall_s at EOF

This fails on gentoo as seen here: https://github.com/perl6/nqp/issues/133
Now it does not try to read from a file when there are no bytes left.