Only living players shall "OOF!" when bouncing off walls under low-friction conditions.

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2681 86ba831e-150c-0410-ab35-e06eaae15ed9
Fixed a major bug in portal offset calculation. Everything works again :)

git-svn-id: http://mancubus.net/svn/hosted/eternity/trunk@2682 86ba831e-150c-0410-ab35-e06eaae15ed9