[parrot/parrot] 03d5e8: minor improvements in the converted pbc_to_exe:

[GitHub]

  Branch: refs/heads/notfound/pbc_to_exe_winxed
  Home:   https://github.com/parrot/parrot
  Commit: 03d5e8ef49421828bca9702af4e426ec91702772
      https://github.com/parrot/parrot/commit/03d5e8ef49421828bca9702af4e426ec91702772
  Author: NotFound <julian.notfound at gmail.com>
  Date:   2012-05-31 (Thu, 31 May 2012)

  Changed paths:
    M tools/dev/pbc_to_exe.winxed

  Log Message:
  -----------
  minor improvements in the converted pbc_to_exe:
- convert remaining gotos
- define a const for the read buffer size
- add a helper routine for spawnw