Host can generate NRE when loading a planet that a client is building on

[PhantomGamers]

as in, when the host is arriving on the planet

This might already be fixed with the currently method we are using in master, but the problem with the method being used now is that clients can receive multiple items back when they are dismantling items due to PlayerAction_Build.DoDismantleObject() potentially running multiple times

[PhantomGamers]

With #377 this can be triggered from the LoadPlanetData function calling CreateRenderingBatches() hmm

EDIT: This was actually a different issue, fixed in that PR.