[ODE] Disabling geoms

[O'dell Hicks]

    I have a pool of geoms and bodies that I use for various projectiles in
my game (all created at start and reused).  When I want my geoms to be
inactive (that is, no operations performed on them), what is the proper way
to handle it?  My current setup is to remove it from the space it is in and
add it later when active.  I'm thinking that maybe this is kind of slow.  Is
there a better way to do this?