games/falconseye can't save games or bones files

after a few minutes of play it becomes very unlikely that you
can save the game. freopen fails. this problem is discussed at
http://pub78.ezboard.com/fnethackfalconseyefrm2.showMessage?topicID=44.topic

PR: ports/48130
Submitted by: tom <tom@uffner.com>
Approved by: maintainer timeout (and that of me complained about it :-)