release crashes if server is not specified

[Richie Larison]

release dose not seam to be checking for nullity on servername

[Tim Powell (theuiguy)]

Yes, when doing bzr release without a server name it gives this ugly error:

bzr: ERROR: exceptions.TypeError: iteration over non-sequence

Traceback (most recent call last):
  File "/usr/local/lib/python2.4/site-packages/bzrlib/commands.py", line 834, in run_bzr_catch_errors
    return run_bzr(argv)
  File "/usr/local/lib/python2.4/site-packages/bzrlib/commands.py", line 790, in run_bzr
    ret = run(*run_argv)
  File "/usr/local/lib/python2.4/site-packages/bzrlib/commands.py", line 492, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/local/lib/python2.4/site-packages/bzrlib/commands.py", line 800, in ignore_pipe
    result = func(*args, **kwargs)
  File "/usr/local/lib/python2.4/site-packages/bzrlib/plugins/ezbzr/release.py", line 108, in run
    for destination in nick_or_uri_list:
TypeError: iteration over non-sequence

bzr 1.2.0 on python 2.4.4.final.0 (linux2)
arguments: ['/usr/local/bin/bzr', 'release']
encoding: 'UTF-8', fsenc: 'UTF-8', lang: 'en_US.UTF-8'
plugins:
  bzrtools /usr/local/lib/python2.4/site-packages/bzrlib/plugins/bzrtools [1.2.0]
  ezbzr /usr/local/lib/python2.4/site-packages/bzrlib/plugins/ezbzr [unknown]
  launchpad /usr/local/lib/python2.4/site-packages/bzrlib/plugins/launchpad [unknown]
*** Bazaar has encountered an internal error.
    Please report a bug at https://bugs.launchpad.net/bzr/+filebug
    including this traceback, and a description of what you
    were doing when the error occurred.

[Tim Powell (theuiguy)]

It might be beneficial for release with no branch specified to go to the parent branch.