Avoid passing non-contiguous position field from and to sam. Don't really understand why/if this is not necessary for sam_add_field and sam_pop_field (this was already non-contiguous for the metric tensor). How's that for a reassuring commit message?
Avoid passing non-contiguous position field from and to sam. Don't really understand why/if this is not necessary for sam_add_field and sam_pop_field (this was already non-contiguous for the metric tensor). How's that for a reassuring commit message?

FluidityProject/multifluids,FluidityProject/multifluids,FluidityProject/multifluids,FluidityProject/multifluids