Exclusion handling for 4 site water is not doing G->D correctly.

[mrshirts]

The exclusion section:

[ exclusions ]
1 2 3 4
2 1 3 4
3 1 2 4
4 1 2 3

Is being written to DESMOND as:

ffio_exclusions[2] {
  i_ffio_ai
  i_ffio_aj
  :::
  1 1 2
  2 1 3
  :::
}

It is being written correctly to GROMACS, so it looks like a conversion problem to DESMOND.