OCTSAV_EMPTY fix


git-svn-id: http://svn.code.sf.net/p/sauerbraten/code@4995 07af1644-1164-4067-b897-63bf4dc9b748
server port checks


git-svn-id: http://svn.code.sf.net/p/sauerbraten/code@4996 07af1644-1164-4067-b897-63bf4dc9b748