add an important note

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10094 387891d4-d844-0410-90c0-e4c51a9137d3
we can just use the STL methods here

git-svn-id: svn://svn.icculus.org/fs2open/trunk/fs2_open@10095 387891d4-d844-0410-90c0-e4c51a9137d3