fix for :count command of ghciext package

If somebody managed to download it already there is a newer version. Break point counter inside break expressions was one less than it should be. Sorry for inconvenience. It is still very new. Not sure there would be enough interest to put it on hackage or something like that. Let me know if you want it. http://www.hck.sk/users/peter/pub/ghciext-0.2.tar.gz Peter.