Because floating points, it's possible that a creature has reached their
destination even if the *progress* to that destination is at 0 - if that
happens, they should pick a new destination regardless. This fixes the
issue where creatures would occasionally get "stuck" and never move
after wandering around for a bit.
Change-Id: I01a11ce4bd448c25a818c886825e4fad56dffe03
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3885
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI