* kill.cc (forcekill): Do not pass negative pids to cygwin_internal. Check if sig == 0. Improve error messages. (main): Make pid a long long and distinguish between pids, gpids (i.e. negative pids) and Win9x pids.
* kill.cc (forcekill): Do not pass negative pids to cygwin_internal. Check if sig == 0. Improve error messages. (main): Make pid a long long and distinguish between pids, gpids (i.e. negative pids) and Win9x pids.