qdiff crashes on different line-endings changes

[Jeremy Yoder]

The only change made to the file was converting DOS line endings on a few lines to UNIX line endings.

Error log shows:

bzr: ERROR: exceptions.IndexError: pop from empty list

Traceback (most recent call last):
  File "C:/Program Files (x86)/Bazaar/plugins\qbzr\lib\trace.py", line 365, in reports_exception_decorate
  File "C:/Program Files (x86)/Bazaar/plugins\qbzr\lib\diffwindow.py", line 534, in initial_load
  File "bzrlib\cleanup.pyo", line 131, in run
  File "bzrlib\cleanup.pyo", line 165, in _do_with_cleanups
  File "C:/Program Files (x86)/Bazaar/plugins\qbzr\lib\diffwindow.py", line 548, in _initial_load
  File "C:/Program Files (x86)/Bazaar/plugins\qbzr\lib\diffwindow.py", line 641, in load_diff
  File "C:/Program Files (x86)/Bazaar/plugins\qbzr\lib\diffview.py", line 439, in append_diff
  File "C:/Program Files (x86)/Bazaar/plugins\qbzr\lib\diffview.py", line 388, in insertIxsWithChangesHighlighted
IndexError: pop from empty list

bzr 2.4.2 on python 2.6.6 (win32)
arguments: ['C:\\Program Files (x86)\\Bazaar\\bzrw.exe', 'explorer']
encoding: 'cp1252', fsenc: 'mbcs', lang: None
plugins:
  bzrtools C:\Program Files (x86)\Bazaar\plugins\bzrtools [2.4.1]
  changelog_merge C:\Program Files (x86)\Bazaar\plugins\changelog_merge [2.4.2]
  colo C:\Program Files (x86)\Bazaar\plugins\colo [0.3.1dev]
  explorer C:\Program Files (x86)\Bazaar\plugins\explorer [1.2.1]
  fastimport C:\Program Files (x86)\Bazaar\plugins\fastimport [0.12.0dev]
  launchpad C:\Program Files (x86)\Bazaar\plugins\launchpad [2.4.2]
  loom C:\Program Files (x86)\Bazaar\plugins\loom [2.2.1dev]
  netrc_credential_store C:\Program Files (x86)\Bazaar\plugins\netrc_credential_store [2.4.2]
  news_merge C:\Program Files (x86)\Bazaar\plugins\news_merge [2.4.2]
  pipeline C:\Program Files (x86)\Bazaar\plugins\pipeline [1.1.0]
  qbzr C:\Program Files (x86)\Bazaar\plugins\qbzr [0.21.1]
  rewrite C:\Program Files (x86)\Bazaar\plugins\rewrite [0.6.3dev]
  svn C:\Program Files (x86)\Bazaar\plugins\svn [1.1.0]
  upload C:\Program Files (x86)\Bazaar\plugins\upload [1.0.1dev]
  xmloutput C:\Program Files (x86)\Bazaar\plugins\xmloutput [0.8.7]

[Alexander Belchenko (bialix)]

that's dupe of another bug report.