Unversioned files are deleted by rebase

[IWATA Hidetaka]

Unversioned files are deleted by rebase with no confirmation.

To reproduce:

1. make "trunk"
 $ bzr init trunk
 $ cd trunk
 $ echo foo>foo
 $ bzr add
 $ bzr commit -m "1st commit"

2. make "test" branch from "trunk"
 $ bzr branch . ..\test

3. Add sub directory to "trunk"
 $ bzr mkdir subdir
 $ bzr commit -m "add subdir"

4. Add file into sub directory and leave it unversioned
 $ echo bar>subdir\bar

5. commit some changes in "test"
 $ cd ..\test
 $ echo fooo>foo
 $ bzr commit -m "modify foo"

6. rebase "test" into "trunk"
 $ cd ..\trunk
 $ bzr rebase ..\test

Then, subdir\bar is lost.
I think rebase should stop is such situations.

==
Bazaar (bzr) 2.5.1dev
  Python interpreter: C:\DEVELOP\py_envs\bzr2.5-mingw\Scripts\python.exe 2.7.2
  Python standard library: C:\DEVELOP\py_envs\bzr2.5-mingw\lib
  Platform: Windows-7-6.1.7601-SP1
  bzrlib: C:\DEVELOP\py_envs\bzr2.5-mingw\lib\site-packages\bzrlib
  Bazaar configuration: C:/Users/iwata/AppData/Roaming/bazaar/2.0
  Bazaar log file: C:\Users\iwata\Documents\.bzr.log

Revision of bzr-rewrite : r256