qlog: press left arrow when there is no direct line to left: traceback

[Alexander Belchenko]

bzr: ERROR: exceptions.AttributeError: 'NoneType' object has no attribute 'f_index'

Traceback (most recent call last):
  File "C:\work\Bazaar\plugins\qbzr\lib\logwidget.py", line 287, in keyPressEvent
  File "C:\work\Bazaar\plugins\qbzr\lib\logmodel.py", line 393, in index_from_c_rev
AttributeError: 'NoneType' object has no attribute 'f_index'

bzr 2.5.0 on python 2.6.6 (win32)
arguments: ['C:\\Program Files\\Bazaar\\bzr.EXE', 'qlog', 'emulib']
encoding: 'cp1251', fsenc: 'mbcs', lang: None
plugins:
  acad C:\work\Bazaar\plugins\acad [0.8.0]
  bzrtools C:\Program Files\Bazaar\plugins\bzrtools [2.5.0]
  colo C:\work\Bazaar\plugins\colo [0.3.1dev]
  explorer C:\work\Bazaar\plugins\explorer [1.3.0dev]
  fastimport C:\Program Files\Bazaar\plugins\fastimport [0.14.0dev]
  find_branches C:\work\Bazaar\plugins\find_branches [unknown]
  format1 C:\work\Bazaar\plugins\format1 [unknown]
  git C:\Program Files\Bazaar\plugins\git [0.6.7]
  launchpad C:\Program Files\Bazaar\plugins\launchpad [2.5.0]
  punchcard C:\work\Bazaar\plugins\punchcard [unknown]
  qbzr C:\work\Bazaar\plugins\qbzr [0.23.0dev]
  rewrite C:\Program Files\Bazaar\plugins\rewrite [0.6.4dev]
  scmproj C:\work\Bazaar\plugins\scmproj [0.6.2]
  svn C:\Program Files\Bazaar\plugins\svn [1.2.1]
  tiplog C:\work\Bazaar\plugins\tiplog [0.0.5dev]
  undelete C:\work\Bazaar\plugins\undelete [0.2.0]
  x_bit C:\work\Bazaar\plugins\x_bit [1.0.0]

See attached screenshot for the qlog view.

[Alexander Belchenko (bialix)]

this is my p-terminal branch with new graphics. run `bzr qlog emulib`.