Fix for Mantis 2882: "None" team color setting causes errors. Also fixes a few other oversights.


git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9692 387891d4-d844-0410-90c0-e4c51a9137d3
oops, broke something

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@9693 387891d4-d844-0410-90c0-e4c51a9137d3