Infinite loop in cascade_filter_fn()

Hi.

My git repository walker just got bitten by what seems to be a reasonably 
new bug in convert.c:cascade_filter_fn() (git 1.7.8.rc3 (gentoo)).

How to reproduce:

   git clone git@github.com:pikelang/Pike.git

   git checkout -f 0e2080f838c6f0bc7d670ac7549676a353451dca^

   git checkout -f 0e2080f838c6f0bc7d670ac7549676a353451dca

The first two commands complete as expected, while the last hangs forever.
Performing the same with git 1.7.6.4 works as expected.

The problematic file seems to be /src/modules/_Crypto/rijndael_ecb_vt.txt 
which has the attributes: text ident eol=crlf

Thanks,

--
Henrik Grubbström					grubba@grubba.org
Roxen Internet Software AB				grubba@roxen.com