qdiff marks the wrong lines when line ending style changes

[Bernhard Voelker]

`bzr qdi` marks the wrong lines as changed when the line ending changes
from DOS style to 0D0D0A in between a file. `bzr di` is still right.

Attached are the 2 revisions of a .js file plus a screenshot of qdiff.

D:\bzr-diff-lost>bzr --version
Bazaar (bzr) 2.3.0
  Python interpreter: C:\Program Files\Bazaar\python26.dll 2.6.6
  Python standard library: C:\Program Files\Bazaar\lib\library.zip
  Platform: Windows-XP-5.1.2600-SP3
  bzrlib: C:\Program Files\Bazaar\lib\library.zip\bzrlib
  Bazaar configuration: C:\Documents and Settings\vb027591\Application Data\bazaar\2.0
  Bazaar log file: D:\UserData\vb027591\My Documents\.bzr.log

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[Alexander Belchenko (bialix)]

It seems our unidiff view can show the right thing, and only side-by-side view is affected.

[Alexander Belchenko (bialix)]

Attached branch with files provided by bug reporter, committed as r1 and r2 for easy testing.