Error retrieving log for a file that has been deleted and readded

[Lewis Baker]

Trac displays an error with the following stack-trace if the file has a revision with action add, branch or import that is not #1:

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 299, in dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 189, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.4/site-packages/trac/versioncontrol/web_ui/log.py", line 111, in process_request
    for old_path, old_rev, old_chg in history(limit+1):
  File "build/bdist.linux-i686/egg/p4trac/api.py", line 769, in get_history
AttributeError: 'Node' object has no attribute 'rev'

[Lewis Baker]

(In [1211]) Fixed coding error in retrieving change history for a file that has been deleted and re-added.

Fixes #669.