The problem is that you deleted path_finder.cpp/h and didn't commit the new path_finder folder.
Doh! That's your trick
Update:
Should compile under windoze ok now, but it is failing an assert in debug somewhere.... this doesn't appear to crash the game release though... VC++ was not helping at all in trying to find it, kept dumping me 'in the middle of nowhere' staring at a stack trace full of memory addresses... so I thought I'd check how things are looking on linux...
I updated the Jamfile, but there are build errors... I haven't got things set up in kdevelop yet, so this may not get sorted out today... There's not many errors, but enough that I'm not willing to sort them out the 'old fashioned' way.