Fix for mantis 2503: clear red alert wingman data before loading new wingman data

git-svn-id: svn://svn.icculus.org/fs2open/branches/antipodes@9507 387891d4-d844-0410-90c0-e4c51a9137d3
Trunk sync r9508.

git-svn-id: svn://svn.icculus.org/fs2open/branches/antipodes@9509 387891d4-d844-0410-90c0-e4c51a9137d3
Trunk sync r9516.

git-svn-id: svn://svn.icculus.org/fs2open/branches/antipodes@9519 387891d4-d844-0410-90c0-e4c51a9137d3
Fix mantis 2781: use LastPlayer consistently in .ini files/registry

git-svn-id: svn://svn.icculus.org/fs2open/branches/antipodes@9521 387891d4-d844-0410-90c0-e4c51a9137d3
Trunk sync r9530


git-svn-id: svn://svn.icculus.org/fs2open/branches/antipodes@9531 387891d4-d844-0410-90c0-e4c51a9137d3