now that we have queued_animation_init, we can rewrite this properly

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10077 387891d4-d844-0410-90c0-e4c51a9137d3
these memsets aren't needed

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10078 387891d4-d844-0410-90c0-e4c51a9137d3