Fixed possible crashes related to the eyepoint orientation features.

git-svn-id: svn://svn.icculus.org/fs2open/branches/zookeeper@9936 387891d4-d844-0410-90c0-e4c51a9137d3
Fixed shield quadrant number getting broken when changing from a point shields ship to a one with standard shields.

git-svn-id: svn://svn.icculus.org/fs2open/branches/zookeeper@9937 387891d4-d844-0410-90c0-e4c51a9137d3