Fix infinite loop in `intersection_with_local_plane`

[ThierryBerger]

• Attempt to fix https://github.com/dimforge/parry/issues/215

Only failing test for now

the loop occurs within the 'traversal labelled loop, the 2 if conditions are never true in our case.

Wild guess

It seems weird that we have twice the same index in the index_adjacencies list ? But I'm not sure there: